Aims. The aim of this study was to investigate the safety and efficacy of 3D-printed modular prostheses in patients who underwent joint-sparing limb salvage surgery (JSLSS) for malignant femoral diaphyseal bone tumours. Methods. We retrospectively reviewed 17 patients (13 males and four females) with femoral diaphyseal tumours who underwent JSLSS in our hospital. Results. In all, 17 patients with locally aggressive bone tumours (Enneking stage IIB) located in the femoral shaft underwent JSLSS and reconstruction with 3D-printed modular prostheses between January 2020 and June 2022. The median surgical time was 153 minutes (interquartile range (IQR) 117 to 248), and the median estimated blood loss was 200ml (IQR 125 to 400). Osteosarcoma was the most common pathological type (n = 12; 70.6%). The mean osteotomy length was 197.53 mm (SD 12.34), and the median follow-up was 25 months (IQR 19 to 38). Two patients experienced local recurrence and three developed distant metastases. Postoperative complications included wound infection in one patient and screw loosening in another, both of which were treated successfully with revision surgery. The median Musculoskeletal Tumor Society score at the final follow-up was 28 (IQR 27 to 28). Conclusion. The 3D-printed modular prosthesis is a reliable and feasible reconstruction option for patients with malignant femoral diaphyseal tumours. It helps to improve the limb salvage rate, restore limb function, and achieve better short-term effectiveness. Cite this article: Bone Jt Open 2024;5(4):317–323

Wide resection of bone tumour has become an accepted treatment in the limb salvage surgery. The reconstruction of the residual defect following wide resection is a major problem. Author had reviewed the results of five reconstruction methods. Osteoarticular graft is suitable for proximal tibial reconstruction and endoprosthesis for distal femoral reconstruction. Autograft is rarely used to reconstruct the large residual defect. Cement can reconstruct the larger defect, but it is not a suitable procedure on long term basis. Health technology has been defined by WHO as the set of techniques, drugs, equipment and procedure used by health care professionals in delivering medical care to individuals and the system within which such care is delivered. Health technology assessment includes analyses of safety, efficacy and effectiveness, cost and cost effectiveness, infrastructure factors, social impact and fit, needs and capabilities of local health care delivery system. The reimplanatation of resected autoclaved tumour bone graft is technically a simple, financially a cost saving and a biological solution for this difficult problem. This method of reconstruction fulfills all criteria of health technology. It is the suitable method of reconstruction in limb salvage surgery for all countries, but most suitable for the developing and poor countries where the resources for other methods are not available due to financial, technical or socio-cultural reasons

To assess the performance and success of joint sparing limb salvage surgery in high grade malignancy, in terms of function, complications, recurrence and survival, as compared to joint resection. We report a ten-year experience of twenty patients with high grade malignancies of bone which did not cross the epiphyseal plate. They underwent not only limb salvage surgery but also joint preservation. The aim of this is to preserve function in the joint and to prevent the inevitable wear of prosthetic joints requiring revision surgery. The age range was 4 - 25 years (mean 13. 5). The Diagnoses were 14 Osteosarcomas and 6 Ewings sarcomas. Mean follow up was 49 months. There were 13 femoral & 7 tibial malignancies. 12 underwent complex biological fixation with a combination of reimplanted autoclaved or irradiated bone; vascularised fibular graft; femoral or humeral allograft. In 8 cases custom made hydroxyapatite coated prostheses were used to replace the resected bone. This surgery must clearly be evaluated in the context of recurrence, particularly as this is associated with an increased risk of metastases and death. Analysis of our results to date has not shown a greater rate of complications. We experienced one recurrence, and one death. The custom prostheses group had fewer complications and operations. Functionally these patients report near normal limbs and joints and do not report any limitation of activities. Joint sparing limb salvage surgery is extremely worthwhile as it produces a significantly better functioning limb and lower morbidity, with less likelihood of revision surgery. We have not found a higher risk of post-operative complications, recurrence or death. Furthermore massive prosthetic replacement is quicker, osseointegrates reliably and is associated with a lower complication and further operation rate

Introduction: Primary bone lymphoma is a rare neoplastic disease of bone. Treatment consists predominantly of chemotherapy and radiotherapy. Surgery can be considered for large lytic lesions with impending pathological fractures. This study was performed to find the functional and oncological outcome of patients who underwent limb salvage surgery and custom mega prosthesis for lymphoma of bone. Materials and Methods: Eight patients with lymphoma of bone underwent limb salvage surgery and reconstruction with custom made prosthesis. Males predominated in the study with the average age of 30 years. Lower limb was commonly involved: 6 patients had tumour involving the femur. Five patients had pathological fracture. Resection and reconstruction was done using custom mega prosthesis. Proximal humeral prosthesis was used for proximal humeral tumour and proximal femoral or total hip prosthesis for proximal femoral lesion. One patient each had total femoral prosthesis and total knee prosthesis. Results: With an average follow-up of 78.6 months, two patients died of disease and one patient was alive with disease. The patient with femoral shaft lesion had intra-operative vascular injury requiring vascular repair. The patient with total knee prosthesis had superficial skin necrosis which required skin cover. The functional outcome was satisfactory in 5 patients. Discussion: Primary bone lymphoma accounts for 7% of all bone tumours. There is a male predominance and femur is the most common site of involvement. Five patients in our series had pathological fractures warranting surgical stabilisation. Limb salvage surgery with custom mega prosthesis appears to be a feasible option as more than 65% of our patients had satisfactory functional outcome. They were able to mobilise early with good pain relief and a useful functional limb

The use of megaprosthesis presents a major advancement in orthopaedic oncology in the treatment of malignant bone and soft tissue tumours. In the present study, we retrospectively analyse the complication rate of limb salvage surgery with megaprosthesis due to malignant tumours treated in our unit. From 1997 until 2006, 64 patients (37 men, 27 women), aged between 16–78 years old (mean 43.3), have been treated with megaprosthesis insertion. The diagnosis was metastatic bone lesions in 26 patients, osteosarcoma in 14, chondrosarcoma in 14, soft tissue sarcoma with osseous involvement in 3 (2 synovial sarcoma and 1 MPNST), malignant giant cell tumour in 3, angiosarcoma in 2, Ewing sarcoma in 1, and revision of a failed reconstruction in 1 patient. Lower extremity reconstruction included proximal femur (30 patients), distal femur (19), proximal tibia (3) and total femur replacement (4). Upper extremity procedures were proximal humerus (7 patients) and distal humerus reconstruction (1). Sixty patients were available for follow-up (minimum 1 year, mean 4.2 years). The following complications were encountered: periprosthetic fracture (1 patient), deep infection (4), superficial wound infection (6), local recurrences (2), hip dislocation (3), knee extensor apparatus failure (2), skin necrosis, (3) unsuccessful vascular reconstruction (1). The deep infection led to hip disarticulation in 1 patient and Tikhoff-Linberg resection in 1 patient with proximal humerus prosthesis. A rare case of bone leismaniasis was also encountered (treated conservatively). Limb salvage surgery is the mainstay of treatment in malignant musculoskeletal tumours. Special megaprosthesis has been developed for this purpose. Survival rate is substantially less than common prosthesis; the complication rate is increased, especially regarding wound healing complications and infection. Adverse prognostic factors are:. a) advanced age,. b) the amount of soft tissues that need to be excised,. c) prolonged surgical time, and. d) reconstruction about the knee

We looked at long-term psychological effects of limb salvage surgery on young people treated for osteosarcoma and Ewing sarcomas with limb salvage surgery and high-dose neo-adjuvant chemotherapy. After an extensive survey of the literature, we conducted semi-structured interviews with five young adult survivors. They reported various treatment-linked psychological symptoms, some of which persisted in varying degrees for up to 10 years after completion of treatment. Depending largely upon social and family support during and after treatment, the symptoms seem to become less invasive as time passes, but the survivors reported that some of them recur at transition periods in their lives and before annual follow-up visits. All view themselves as stronger people who have learnt much from their experience, and said that counselling and the provision of information at the treatment centres had helped in their adaptation. The multi-disciplinary team approach in the treatment of adolescents and young adults with cancer is of paramount importance

Aim: To assess the functional outcomes for patients treated by limb salvage surgery for sarcomas of the upper limb and shoulder girdle. Materials and methods: Patients who had undergone limb salvage surgery for upper limb sarcoma between 1997 and 2004 were entered into the study. The operation notes were used to obtain details of the surgery. Pathology reports were consulted to identify the type, grade and margins of the tumour. The Toronto Extremity Salvage Score (TESS) questionnaire was used to assess post-operative function, in a postal survey. Results: A total of 62 patients were identified. Liposarcoma was most common histological diagnosis, and “low” the most common grade (27). Histologically clear margins were achieved in 28 (44%) cases, marginal in 2 (3%), incomplete in 13 (21%) and indeterminate in 20 (32%). 30% had received adjuvant radiotherapy with or without chemotherapy as indicated. A total of 48 (76%) had been treated with excision and primary closure, 7 (11%) with local flaps, and 4 (6%) with endoprostheses. 10 patients had died, and 1 was untraceable. 29 completed TESS questionnaires were returned; with an average follow-up of 33 months post-resection (range 4 to 83). 11 female (38%), 18 male (62%), with an average age at surgery of 55. The average TESS score was 77 +/−10 with a range of 18–100. For the different regions, forearm sarcomas had an average TESS of 81 +/−17, upper arm 76 +/−19 and shoulder 81 +/−14. Discussion: Surgical excision of soft tissue tumours with limb salvage aims to balance morbidity and mortality. Upper limb amputation has greater morbidity than lower limb and thus the argument for limb salvage should be stronger. A limb-salvage procedure should be considered preferable to amputation provided oncological outcomes are not compromised, and the resulting functional outcome is worth the oncological risk. In this cohort, patients had good functional outcomes, as described by the TESS functional assessment score, with no evidence of compromised oncological outcome during the follow up period

Free, vascularised fibular grafting is well described in limb salvage surgery. The mechanical properties of the fibula make it ideal for replacement of bony defects after tumour resection and it can be sacrificed with minimal morbidity. We review the outcome of a consecutive series of 24 patients. Between 1993 and 2002 we performed free vascularised fibular grafts in 24 patients as part of a limb salvage procedure following tumour excision. Pre-operatively patients were staged using the Musculoskeletal Tumour Society (MSTS) system. Post-operatively patients were followed up with radiographs and clinical examination. From the radiographs graft hypertrophy and time to bony union was documented. Functional outcome was assessed using the MSTS scoring system. Complications were recorded. There were 15 women and 9 men with a mean age of 26 years (6–52). Mean follow up was 51 months (12–106). There were 19 malignant tumours, all stage 2b, and 5 giant cell tumours. The mean length of graft was 12.5 cm. (4.5–25). 16 grafts were used in the upper limb and 8 in the lower limb. Arthrodesis was performed in 8 cases and intercalary reconstruction in 16 cases. Fixation of grafts was achieved with a plate and screws in 21, a blade plate in 2 and an IM nail in 1. In 6 cases the resected tumour bone was reinserted as autograft after extracorporeal irradiation. In all but one patient the tumour margins were clear. Primary bony union was achieved in 22 patients (92%) at a mean of 35 weeks (12–78). Graft hypertrophy was seen in 7/29 cases (24%). Complications included 2 wound breakdowns, 3 stress fractures, 1 muscle contracture, 1 malunion and 1 painful plate. Overall 8 patients (33%) required second operation. 2 patients died of recurrent disease and one has metastases. The mean MSTS functional score was 87% (80–93). Free vascularised fibula grafts offer a reliable method of reconstruction after excision of bone tumours. The complication rate appears high and some patients require a revision procedure. However, the problems are relatively easy to correct, bony union is achieved in the majority and functional outcome is good

Introduction Free, vascularised fibular grafting is well described in limb salvage surgery. The mechanical properties of the fibula make it ideal for replacement of bony defects after tumour resection and it can be sacrificed with minimal morbidity. We review the outcome of a consecutive series of 24 patients. Methods Between 1993 and 2002 we performed free vascularised fibular grafts in 24 patients as part of a limb salvage procedure following tumour excision. Pre-operatively patients were staged using the Musculoskeletal Tumour Society (MSTS) system. Post-operatively patients were followed-up with radiographs and clinical examination. From the radiographs graft hypertrophy and time to bony union was documented. Functional outcome was assessed using the MSTS scoring system. Complications were recorded. There were 15 women and nine men with a mean age of 26 years (6 to 52). Mean follow-up was 51 months (12 to 106). There were 19 malignant tumours, all stage 2b, and five giant cell tumours. The mean length of graft was 12.5 cm (4.5 to25). Sixteen grafts were used in the upper limb and eight in the lower limb. Arthrodesis was performed in eight cases and intercalary reconstruction in 16 cases. Fixation of grafts was achieved with a plate and screws in 21, a blade plate in two and an IM nail in one. In six cases the resected tumour bone was reinserted as autograft after extracorporeal irradiation. Results In all but one patient the tumour margins were clear. Primary bony union was achieved in 22 patients (92%) at a mean of 35 weeks (12 to 78). Graft hypertrophy was seen in 7/29 cases (24%). Complications included two wound breakdowns, three stress fractures, one muscle contracture, one malunion and one painful plate. Overall eight patients (33%) required second operation. Two patients died of recurrent disease and one has metastases. The mean MSTS functional score was 87% (80 to 93). Conclusions Free vascularised fibula grafts offer a reliable method of reconstruction after excision of bone tumours. The complication rate appears high and some patients require a revision procedure. However, the problems are relatively easy to correct, bony union is achieved in the majority and functional outcome is good

Introduction: Extent of fibular resection dramatically alters limb function. Aim of our study was to evaluate the functional outcome following resections for 23 malignant tumors of fibula. Methods: 23 biopsy proven malignant tumors of fibula were included in the study. There were 11 cases of Ewings sarcoma (PNET), 8 osteosarcomas, 2 malignant fibrous histiocytoma and 1 each of synovial sarcoma and chondrosarcoma. Following chemotherapy (wherever indicated) limb salvage surgery was done in all cases. There were 9 proximal, 6 middle and 9 cases of distal third of fibula. Type I resection was done in all proximal and 4 tumors of middle third fibula. Type II fibular resection with reconstruction of ankle joint was done in 10 cases. Reversal of contralateral fibula to reconstruct the ankle was done in 7 cases. Allograft was used in 3 patients. Results: Average follow up was for 4.5 years (2 to 7 years). 17 patients (68%) were alive after 4 years of surgery. Local recurrence was seen in 3 cases and these were treated by above knee amputation. 3 patients died within 1 year of surgery. 82% of survivors had a good to excellent functional outcome according to the MSTS functional evaluation criteria and 65% were able to bear full weight and had unlimited activity. Recurrence was commonest in patients with PNET. All patients undergoing reversed fibular grafting showed good functional outcome. Discussion and Conclusion: Results of limb salvage in malignant fibular lesions is infrequently reported. Site of fibular lesion is critical in salvage surgery and need for further reconstruction. Good results are obtained with reversed contralateral fibular reconstruction of the ankle

Foreword. Silver coatings, used in many surgical devices, have demonstrated good antimicrobial activity and low toxicity. Oncological musculoskeletal surgery have an high risk of infection, so in the last decades, silver coated mega-prostheses have been introduced and are becoming increasingly widespread. Material and methods. We performed a retrospective analysis of 158 cases of bone tumors, primary or metastatic, treated between 2002–2014 with wide margins resection and reconstruction with tumoral implants. The average age was 59 years (range 11–78 years), all patients were treated by the same surgeon, with antibiotic prophylaxis according to a standard protocol. In 58.5% of patients were implanted silver-coated prostheses, in the remaining part, standard tumor prosthesis. Patients were re-evaluated annually and were recorded complications, with particular attention to infectious diseases. Results. The mean follow-up was 39.5 months. 23.4% of patients died at a median time of 34.9 months after surgery. 18.4% develop complications that required a new surgery, in 12.6% of cases due to infectious problems. Patients treated with silver-coated implants developed early infection in 2.2% of cases against the 10.7% of the patients treated with standard tumor prosthesis. This different among the two groups was statistically significant, while the percentage of late infections, occurred from 6 months after surgery, was similar between groups. Assuming a reduction of antimicrobial silver activity in the time, it was carried out a microscopic analyses [Fig. 1] of silver-coated prostheses explanted 82 months and 27 months after surgery. It confirmed an important degradation of the coating surface with almost complete absence of silver. Silver blood level, taken in a sample of patients, at different time after surgery, always showed values well below the threshold of toxicity, and no patient has never shown any sign of local or general toxicity secondary to silver [Fig. 2]. Discussion. Our study demonstrates that tumor silver-coated implants have a rate of early infection significantly less than traditional implants, while there were no differences in the rate of late infections, as described also in the literature. This likely is related to wear of the silver coating, which occurs on average around 2 years after implantation. Conclusion. We recommend to use silver–coated prosthesis as primary implants for limb salvage surgery, in primary or metastatic bone tumors, considering the absence of signs of toxicity and the lower rate of early infection

Purpose Of The Study: To find the functional and oncological outcome of patients who underwent limb salvage surgery and custom mega prosthesis for Malignant Fibrous Histiocytoma of bone. Methods And Results: Twenty patients with histologically diagnosed Malignant Fibrous Histiocytoma of bone were treated by resection and reconstruction with custom mega prosthesis between May 1991 and December 2002. The average age was 42 and two-thirds of the patients were males. Majority of the tumours were located around the knee and were in Stage II disease of the Enneking system. Wide margins of resection were achieved in 18 patients and reconstruction was done with total knee prosthesis in patients with distal femoral and proximal tibial tumours. The proximal humeral and proximal femoral sites were reconstructed with their respective prosthesis. Fourteen patients treated after 1996 received chemotherapy. With an average follow-up of 57.7 months, 4 patients had amputation for local recurrence and five patients died of disease. Two patients had fracture of prosthesis necessitating revision of prosthesis in one. Functional result was excellent in 5 patients and good in 9 patients. The Kaplan-Meier 5-year survival rates of the patients treated without chemotherapy and with chemotherapy were 50% and 75.8% respectively. Conclusion: MFH is an aggressive malignant tumour with a poor prognosis. A combined approach using neoadjuvant chemotherapy together with adequate surgical margins improves survival

Patients with high-grade osteosarcoma who have been previously misdiagnosed as benign lesions or infection and accordingly been treated by curettage, internal fixation or drainage present a challenge in deciding the most appropriate treatment plan. Since one of the contraindications of limb salvage is the inability to achieve a wide surgical margin, there has been a tendency to treat these patients by amputation. Due to contamination by previous surgeries, limb salvage surgery was thought to be associated with a higher risk of local recurrence. The aim of this study was to evaluate the oncologic outcome following limb salvage surgery done for high-grade osteosarcoma patients who were initially treated inadequately by curettage, internal fixation or drainage. The study included 24 patients (14 males and 10 females) with an average age of 19 years (range 7 to 39 years). All the patients had high-grade osteosarcoma of the extremities. Seven were located in proximal tibia, six distal femur, four proximal humerus, three proximal femur, two distal tibia, one distal radius and one fibula. 14 patients were previously diagnosed as benign lesions and treated by curettage. 5 patients were diagnosed as regular fracture and internally fixed. 5 patients were diagnosed as osteomyelitis and treated by drainage. The patients were staged then treated by neoadjuvant chemotherapy and limb salvage surgery. The average time between the initial procedure and the limb salvage procedure was 7 months (range 3 to 36 months). A wide resection margin was achieved in all patients. The average follow up period was 40 months (range 18 to 110 months). Local recurrence occurred in three patients (12.5%). Three patients developed chest metastases and one patient developed bone metastases. We conclude that patients who had an inadequate surgical procedure prior to the diagnosis of a high-grade osteosarcoma could still be treated by neoadjuvant chemotherapy and limb salvage surgery without a significant increased risk of local recurrence and chest metastases

Purpose: To describe our experience with vascularised fibulas used in sarcoma limb salvage surgery using standardized patient outcome measures. Methods: All vascularised fibulas and osteochondral allografts performed in the Capital District Health authority were assessed. A complete chart review and current functional assessment of the patients using the Toronto Extremity Salvage score (TESS) and the Musculosketal Tumour Society (MSTS) score were performed. Results: Nineteen patients with 19 tumors were recorded. The tumors range from 11 osteosarcomas, 4 Ewing’s sarcoma, 3 Malignant Fibrous Histiocytoma’s and 1 Chondrosarcoma. Average age was 23. The patient demographics are 75% male, 42% smokers, 86% femoral lesions and 13 % presented with pathological fracture. There were 9 hip fusions, 3 knee fusions, 6 intercalary grafts and one osteochondral graft. There was 21 % mortality with 21% lung mets, 20% local recurrence, 15.7% rates of amputation or infection or and non union. Allograft fracture rates of 10% were noted. Two patients underwent numerous operations (18) due to non-compliance. Rate of surgical failures defined as patients requiring re-operation after 2 years is 21%. Of 19 patients 10 are working, 4 are unable and 4 are deceased and 1 lost to follow up. Average follow up is 9.8 years (range of 4–18). Our functional results include TESS averaging 57.5 with a range of 30–105 and MSTS scores of average of 16.8 with a range of 3–28 and a percent score average of 55.8. The average score on the subjective assessment question was 4 equaling a response of accept it and would do it again. The Halifax outcome and functional data corresponds well with that in the literature. Conclusions: The biological repair of a combination of large Allografts with Vascularised Fibula’s is an excellent long term solution for construct survival with unrestricted patient activity

As patients live longer following treatment for soft tissue sarcomas, complications from treatment will continue to emerge. Predicting which patients are at risk allows for improved preoperative planning, treatment, and surveillance. The data presented here suggests that females greater than fifty-five years of age treated with high dose, postoperative radiotherapy in combination with limb salvage surgery for soft tissue sarcomas are at an increased risk of post irradiation fractures. Unlike previous reports, a significantly higher rate of fracture occurred in patients who received higher doses (60 or 66Gy) of radiation versus lower doses (50 Gy). This retrospective study was performed to determine if the timing and dosage of radiotherapy are related to the risk of post radiation pathologic fracture following combined therapy for lower extremity soft tissue sarcomas. Three hundred sixty-four patients with sarcomas treated with external beam radiation therapy and limb salvage surgery were evaluated. High dose radiation was defined as 60 Gy or 66 Gy; low dose as 50Gy. Radiation timing schedules were preoperative, postoperative, or preoperative with a postoperative boost. Univariate and multivariate analysis was used to determine which factors were associated with fracture risk. Twenty- seven pathologic fractures occurred in twenty-three patients. Twenty- four fractures occurred in twenty patients who were treated with high dose radiation. Sixteen of these patients had postoperative radiation (fourteen patients received 66Gy, two received 60Gy), and four had pre-operative radiation with a postoperative boost (total dose = 66Gy). Three fractures occurred in three patients who received low dose preoperative radiation (50Gy). Both high dose radiation (versus low dose) (p=.001) and preoperative radiation (versus postoperative) (p =0.002) were associated with a risk of fracture. Findings in this study were consistent with previous reports in that females over fifty-five years of age who undergo removal of a thigh sarcoma combined with radiation therapy are at a higher risk of a pathologic fracture, and differs in that there was a significantly higher rate of fracture in patients who received higher doses (60 or 66Gy) of radiation versus lower doses (50 Gy), and when radiation therapy was given postoperatively versus preoperatively

Aims: Purpose of this study was to evaluate the results of a staged revision technique in the treatment of deep infection after limb salvage surgery for bone tumors and to identify factors possibly affecting the outcome. Methods: A retrospective study of 19 consecutive patients with an infected bone tumor reconstruction treated at our Institution in the period 1986–1997 was undertaken. All the patients underwent staged revision (two stages in 13 cases, three stages in 5, four stages in 1) using one or more antibiotic loaded cement spacers after debridement and partial (10 cases) or complete (9 cases) removal of the original implant. Postoperatively, all the patients received oral or parenteral antibiotics for a minimum of 4 weeks. Delayed reimplantation was performed in 15 cases, average time to reimplantation being 7 months (4–14). A minimum follow up of 3 years was available in all patients. Cultures identiþed S. Epider-midis in 12 cases (63%), S. Aureus in 4 (21%), mixed organisms in 2 (11%), and were negative in 1 case (5%) despite clinical evidence of infection. Results: At a minimum follow-up of 3 years, 13 patients were continuously infection-free (68%) while 6 relapsed (32%). Two of the 6 relapses were cleared by amputation while 4 remained infected. Average functional result of infection-free patients according to the International Society Of Limb Salvage (ISOLS) was 71% (21.2 points), ranging from 60% to 80% (18 to 24 points). Conclusions: Staged revision with antibiotic loaded cement spacer for infected bone tumor reconstruction is a demanding and expensive technique requiring prolonged inability. Overall success rate in this series approaches 70%. Complete removal of the infected implant, microbiology, appropriate antibiotic selection, and negative cultures before reimplantation are crucial

Aims

We present a retrospective review of patients treated with extracorporeally irradiated allografts for primary and secondary bone tumours with the mid- and long-term survivorship and the functional and radiographic outcomes.

Bone sarcomas are rare cancers and orthopaedic surgeons come across them infrequently, sometimes unexpectedly during surgical procedures. We investigated the outcomes of patients who underwent a surgical procedure where sarcomas were found unexpectedly and were subsequently referred to our unit for treatment. We identified 95 patients (44 intra-lesional excisions, 35 fracture fixations, 16 joint replacements) with mean age of 48 years (11 to 83); 60% were males (n = 57). Local recurrence arose in 40% who underwent limb salvage surgery versus 12% who had an amputation. Despite achieving local control, overall survival was worse for patients treated with amputation rather than limb salvage (54% vs 75% five-year survival). Factors that negatively influenced survival were invasive primary surgery (fracture fixation, joint replacement), a delay of greater than two months until referral to our oncology service, and high-grade tumours. Survival in these circumstances depends mostly on factors that are determined prior to definitive treatment by a tertiary orthopaedic oncology unit. Limb salvage in this group of patients is associated with a higher rate of inadequate marginal surgery and, consequently, higher local recurrence rates than amputation, but should still be attempted whenever possible, as local control is not the primary determinant of survival.

Cite this article: Bone Joint J 2014;96-B:665–72.

In order to understand the role and efficacy of vascularized fibular graft and massive allograft in reconstruction of the knee, we have analyzed and review 25 patients of primary malignant bone tumours within 5 cm around the knee, that were managed primarily by this technique. In 4 patients the distal femur was affected while the proximal tibia was affected in 21 patients. There were 16 male and 9 female with an average age at the time of surgery of 19.7 years (range; 5 to 52), 17 patients (68%) were skeletally immature. The pathology was mostly represented by Osteosarcoma and Ewing sarcoma (15) and 18 patients (72%) received pre-operative chemotherapy. The resection of the tumor was transepiphyseal in 13 patients (52%) and intercalary in 12 patients (48%). The method of reconstruction was mainly concentric (allograft and fibula inside in 22 patients, 88%), while fixation was done principally by diaphyseal plate and metaphyseal screws (14 patients, 56%). Only three flaps failed (12%) detected by postoperative bone scan and confirmed by the clinical follow up. Twelve patients (48%) had 17 local complications (68%). Management of these complications succeeded to control them in nine patients (75%). The average time of union of fibula was 5.6 month (range: 3–10). The average time of union of allograft was 19.6 month (range: 10–34). All allograft united primarily (92%) except two cases; one case required bone graft and re-platting at 13 month postoperative after implant failure to achieve union 2 months later ; the other had infected non-union of allograft and amputation was done. Functional results were evaluated using the modified 30-points Musculoskeletal Tumor Society rating score (MTSRS) at final follow up of average 143 month (range; 28–213): the average total score was 27.4 (range; 18 to 30). All patients had good functional range of motion of the knee with stable knee at final follow up and were able to perform sport. Long term results of this study clearly indicates that allograft and vascularized fibular graft is a useful limb salvage procedure providing a biological long-term solution especially in skeletally immature. This technique provides single stage life long reconstruction. The allograft shell provide early stability and fixation to support a small epiphyseal fragment to preserve the articular surface and the vascularized fibula provides revascularization and osteointgration with the allograft to finally offer a long lasting durable reconstruction with full rang of motion of the knee.

The purpose of our study was to examine the survival and functional outcome of endoprosthetic replacements for non-oncology limb salvage purposes. Although initially designed for bone tumours, such is the versatility of these implants they can be used to salvage failed joint replacements, peri-prosthetic fractures, failed internal fixation and non-union.

Thirty eight procedures were identified from September 1995 to June 2007 from a prospectively kept database, including 17 distal femoral replacements, 12 proximal femoral replacements, 4 proximal humeral replacements, 2 distal humeral replacements, 2 hemi-pelvic replacements and 1 total femoral replacement. The quality of patients’ mobility was used to assess functional outcome and the survival of the prosthesis was calculated using a Kaplan-Meier survival curve.

The Kaplan-Meier implant survival was 91.3% at 5 years, 68.5% at 10 years and 45.7% at 20 years. The limb salvage survival for all reconstructions was 75% at 10 years.

The best survival was as follows pelvic (n=0/2) and total femoral prostheses where there was no failure in either group (n=0/1). Distal femoral replacements survival was 91% at 5 years, a single humeral prosthesis failed at 11 years post surgery, and proximal femoral replacements had a survival at 87.5% at 5 years. Three implants failed, two as a result of infection and required staged revisions and 1 failed as a result of aseptic loosening. Two patients dislocated their proximal femoral replacements, both were treated successfully by closed reduction.

Endoprosthetic replacement appears to be effective and the medium term survival is encouraging. The aim of a pain free functional limb is achievable with this technique. The complication rates are acceptable considering the salvage nature of these patients. We recommend referral of complex cases to a tertiary centre with expertise in this type of surgery.