A delay in establishing the diagnosis of an occult fracture of the hip that remains unrecognised after plain radiography can result in more complex treatment such as an arthroplasty being required. This might be avoided by earlier diagnosis using MRI. The aim of this study was to investigate the best MR imaging sequence for diagnosing such fractures. From a consecutive cohort of 771 patients admitted between 2003 and 2011 with a clinically suspected fracture of the hip, we retrospectively reviewed the MRI scans of the 35 patients who had no evidence of a fracture on their plain radiographs. In eight of these patients MR scanning excluded a fracture but the remaining 27 patients had an abnormal scan: one with a fracture of the pubic ramus, and in the other 26 a T. 1. -weighted coronal MRI showed a hip fracture with 100% sensitivity. T. 2. -weighted imaging was undertaken in 25 patients, in whom the diagnosis could not be established with this scanning sequence alone, giving a sensitivity of 84.0% for T. 2. -weighted imaging. If there is a clinical suspicion of a hip fracture with normal radiographs, T. 1. -weighted coronal MRI is the best sequence of images for identifying a fracture

Aims. Occult (clinical) injuries represent 15% of all scaphoid fractures, posing significant challenges to the clinician. MRI has been suggested as the gold standard for diagnosis, but remains expensive, time-consuming, and is in high demand. Conventional management with immobilization and serial radiography typically results in multiple follow-up attendances to clinic, radiation exposure, and delays return to work. Suboptimal management can result in significant disability and, frequently, litigation. Methods. We present a service evaluation report following the introduction of a quality-improvement themed, streamlined, clinical scaphoid pathway. Patients are offered a removable wrist splint with verbal and written instructions to remove it two weeks following injury, for self-assessment. The persistence of pain is the patient’s guide to ‘opt-in’ and to self-refer for a follow-up appointment with a senior emergency physician. On confirmation of ongoing signs of clinical scaphoid injury, an urgent outpatient ‘fast’-wrist protocol MRI scan is ordered, with instructions to maintain wrist immobilization. Patients with positive scan results are referred for specialist orthopaedic assessment via a virtual fracture clinic. Results. From February 2018 to January 2019, there were 442 patients diagnosed as clinical scaphoid fractures. 122 patients (28%) self-referred back to the emergency department at two weeks. Following clinical review, 53 patients were discharged; MRI was booked for 69 patients (16%). Overall, six patients (< 2% of total; 10% of those scanned) had positive scans for a scaphoid fracture. There were no known missed fractures, long-term non-unions or malunions resulting from this pathway. Costs were saved by avoiding face-to-face clinical review and MRI scanning. Conclusion. A patient-focused opt-in approach is safe and effective to managing the suspected occult (clinical) scaphoid fracture. Cite this article: Bone Jt Open 2024;5(2):117–122

Patellar dislocation is a common presentation with a clear management pathway. Sometimes, however, what a patient experiences as the patella dislocating may, in fact, be ACL insufficiency. We reviewed case notes and imaging of 315 consecutive ACL reconstructions, collecting data on the date and mechanism of injury, time to MRI, and reconstruction. We noted cases initially diagnosed as patellar dislocation. 25 of 315 (7.9%) patients were initially diagnosed with a patellar dislocation. Subsequently, however, MRI scans revealed no evidence of patellar dislocation and instead showed ACL rupture with pathognomonic pivot-shift bony oedema. The false patella dislocation group were 32% female and had an average age of 25; the rest of the group average age was 27.1 and there were a lower proportion of females; 21%. The false patella instability patients had a median waiting time of 412 days from injury to operation (range: 70-2445 days), compared to 392 days (range: 9 – 4212 days) for rest of the patients. 5 of the remaining 290 had MRIs showing patella oedema with medial patello-femoral ligament injury in addition to their ACL rupture. From our literature search this is a new finding which shows that ACL rupture can present with symptoms suggestive of patellar dislocation. These findings raise the risk that there are a group of people who have been diagnosed with patellar instability who instead have ACL insufficiency and so are at risk of meniscal and chondral damage. Further research should analyse those diagnosed with patellar instability to quantify missed ACL injuries

Incomplete intertrochanteric fractures do not extend across to the medial femoral cortex and are stable, without rotational deformity or shortening of the lower limb. The aim of our study was to establish whether they can be successfully managed conservatively. A total of 68 patients over a five-year period presented with a suspected fracture of the femoral neck and underwent an MRI scan for further assessment. From these, we retrospectively reviewed eight patients with normal plain radiographs but with an incomplete, intertrochanteric fracture on MRI scan. Five were managed conservatively and three operatively. The mean length of hospital stay was 16 days for the conservatively-treated group and 15 days for those who underwent surgery; this was not statistically significant (p > 0.5) and all patients were mobilised on discharge. Although five patients were readmitted at a mean of 3.2 years after discharge, none had progressed to a complete fracture. We believe that patients with incomplete intertrochanteric fractures should be considered for conservative treatment

Aims

There is a lack of published evidence relating to the rate of nonunion seen in occult scaphoid fractures, diagnosed only after MRI. This study reports the rate of delayed union and nonunion in a cohort of patients with MRI-detected acute scaphoid fractures.

Aims

The aim of this study was to assess whether it is possible to predict the mortality, and the extent and time of neurological recovery from the time of the onset of symptoms and MRI grade, in patients with the cerebral fat embolism syndrome (CFES). This has not previously been investigated.

Magnetic resonance imaging (MRI) validation of a novel method of assessing Distal Radial Fracture (DRF) reduction using the hypothesised constant relationship between the dorsal radial cortex (DC) and the superior pole of the lunate (SL). MRI scans of 28 normal wrists were examined. Scans included the distal third of the radius to the proximal carpal row. Beginning 5cm proximal to the distal radius articular surface, a line was superimposed upon the DC extending distally through the metaphyseal flare. Lunate height (LH) and distance from the DC line to the SL (DC-SL) were measured at 5-degree rotational increments around the radial shaft central axis to a total of 30 degrees of supination and pronation (S+P). The DC-SL/LH ratio was compared to 0 degrees (anatomical lateral) using the two-tailed paired student t-test. There was no significant difference in DC-SL:LH between 0 degrees of rotation and any 5-degree increment up to 30 degrees of S+P (lowest p=0.075). The DC line lay consistently dorsal to the SL. A constant DC-SL relationship exists with up to 30 degrees of S+P. This reference can be quickly and accurately used to assess DRF reduction in poorly-taken films with malrotation up to 30 degrees from anatomical lateral. Research comparing DC-SL distance with volar tilt to assess DRF reduction is needed

In 2004 the Scottish Sarcoma Network (SSN) was established with the aim of optimising management of patients with sarcoma. Clinical, radiological, oncological and pathological details of all bone and soft tissue sarcomas presenting in Scotland are registered and cases discussed in a multi-centre, tele-link multidisciplinary team (MDT) forum. The aim of this study was to establish any difference in referral patterns, time to specialist review, preoperative MRI scanning and appropriate biopsy before and after establishment of the Scottish Sarcoma Network in Grampian. A database was established of all patients presenting with sarcomas of the trunk or extremity in Grampian between 1991 and 2010. One hundred and fifty eight patients were randomly selected, 79 (50%) presenting prior to the establishment of the Scottish Sarcoma Network. Since the initiation of the Scottish sarcoma network we found that the median time of referral to review by the sarcoma service has improved from 19.5 days to 10 days (P=0.016). There has been an increase in the number of patients referred from other specialities while the number of general practice has remained fairly constant. This has resulted in a slight increase in the median total patient journey from 35 days to 41 days, this does not reach statistical significance. A greater number of patients are undergoing pre biopsy MRI scan, 53 (67%) before 2004 and 68 (86%) after (P=0.009). More patients are also undergoing appropriate biopsy 45(57%) before the network and 62(79%) after. The creation of the Scottish Sarcoma Network has had a positive impact on the care of sarcoma patients presenting in Grampian

Intra-articular shoulder pathology has been recognised in more detail following widespread use of shoulder arthroscopy. The purpose of this epidemiological study is to present the incidence and exact type of SLAP lesions in our operated population and to correlate them with the presence of other shoulder lesions. Between 2004 and 2010 425 patients underwent shoulder arthroscopy in our department (311 for rotator cuff tears or subacromial impingement, 102 for shoulder instability, 12 for SLAP lesions). Eighty-two SLAP lesions (19.2% overall) were recognized during these procedures. In 44 cases the lesion was SLAP type I (53.6%), in 10 type II (12.2%), in 1 type III (1.2%), in 1 type IV (1.2%), in 24 type V (29.26%) and finally in 2 type VI (2.43%). In more detail SLAP I lesions were associated in 8 patients with subacromial impingement syndrome, in 33 with RC tear and in 3 patients with anterior instability. Type II, III and IV were preoperatively diagnosed, while type V and VI lesions were found in patients with chronic anterior shoulder instability. SLAP lesions are diagnosed more accurately during shoulder arthroscopy rather than with plain shoulder MRI scan. In our study population only 12 cases were accurately diagnosed with a pre-operative MRI scan, while the remaining 70 cases were missed. Additionally, there was significant correlation between rotator cuff problems and SLAP I lesions, while chronic shoulder instability was associated with SLAP V and VI (25.4% of patients with instability). Shoulder arthroscopy not only has changed SLAP lesion diagnosis and treatment but also reveals the correlation of various SLAP lesion types with specific shoulder pathologies

The aim of our study was to compare the clinical versus radiological diagnosis of patients suffering from a Morton's neuroma. Clinical assessments and pre operative radiological imaging of patients who underwent operative procedures for an excision of a Morton's neuroma were retrospectively compared. This review included 43 excised Morton's neuromas from 36 different patients over a period of 68 months, performed by one surgical team. The commonest clinical symptoms were those of pain or tingling on the plantar aspect of the affected webspace on direct palpation (100%), pain of weight bearing (91%) which was relieved by rest (81%) and pain on stretching the toes (79%). The most sensitive clinical sign was a Mulder's click. Our results showed that clinical assessment was the most sensitive method of diagnosing these neuromas (98%). All of our patients had at least one mode of radiological investigation. Ultrasonography was the commonest requested single imaging modality in our series. It was found to have a sensitivity of 90% (28/31). This imaging technique has the disadvantage of being operator dependant, as highlighted by the fact that one of our patients had a correct radiological diagnosis after a repeat ultrasound to the affected area was requested. Magnetic Resonance Image scan is a more expensive technique as it has the advantage of producing static reproducible images. As a single imaging modality, it was found to have a sensitivity of 92% (12/13) in our series. 3 patients had both imaging modalities; initial ultrasound failed to convincingly diagnose a neuroma in 2 cases and in the other case, the initial MRI did not show any pathology. In all these cases, the repeat imaging techniques confirmed the clinical diagnosis. We conclude that there is no absolute requirement for ultrasonography or magnetic resonance imaging in patients who clinically are suspected to have a Morton's neuroma, as the clinical examination was found to be the most sensitive method of diagnosis. We suggest that the two main indications for performing some form of imaging is (a) an unclear clinical assessment and (b) cases when more than one webspace appears to be affected. An ultrasound of the webspaces should be the radiological investigation of choice, followed by a magnetic resonance scanning if any uncertainty still remains

The Essex-Lopresti injury (ELI) of the forearm is a rare and serious condition which is often overlooked, leading to a poor outcome. . The purpose of this retrospective case study was to establish whether early surgery can give good medium-term results. . From a group of 295 patients with a fracture of the radial head, 12 patients were diagnosed with ELI on MRI which confirmed injury to the interosseous membrane (IOM) and ligament (IOL). They were treated by reduction and temporary Kirschner (K)-wire stabilisation of the distal radioulnar joint (DRUJ). In addition, eight patients had a radial head replacement, and two a radial head reconstruction. All patients were examined clinically and radiologically 59 months (25 to 90) after surgery when the mean Mayo Modified Wrist Score (MMWS) was 88.4 (78 to 94), the mean Mayo Elbow Performance Scores (MEPS) 86.7 (77 to 95) and the mean disabilities of arm, shoulder and hand (DASH) score 20.5 (16 to 31): all of these indicate a good outcome. In case of a high index of suspicion for ELI in patients with a radial head fracture, we recommend the following: confirmation of IOM and IOL injury with an early MRI scan; early surgery with reduction and temporary K-wire stabilisation of the DRUJ; preservation of the radial head if at all possible or replacement if not, and functional bracing in supination. This will increase the prospect of a good result, and avoid the complications of a missed diagnosis and the difficulties of late treatment. Cite this article: Bone Joint J 2014;96-B:1385–91

Kinematic alignment has increased in popularity over the last few years in an attempt to improve clinical outcomes following total knee arthroplasty (TKA). In our unit kinematic alignment has been used with patient-specific cutting guides as part of on-going clinical trials. We performed a retrospective analysis on all the TKA which had been planned to be implanted outside of the mechanical axis (0° ± 3°) based on pre-operative MRI scans and looked at their radiographic and clinical outcomes. We identified 21 knees which had been implanted as ‘planned outliers’. All had clinical and radiographic follow up to a mean 11.6 months post op. All had a standard long leg alignment radiograph performed at 6 weeks post op to confirm alignment. All patients had a good improvement in their Oxford Knee Scores with mean improvement from 23 pre-op to 42 at 1 year. Of our patients none had a poor clinical outcome due to the alignment of their TKA, 1 patient had a poor outcome because of a quadriceps rupture which occurred 4 months post-op. There were no post-operative radiographic abnormalities. In our unit kinematic alignment outside of the mechanical axis is not associated with an increased rate of short term complications

Intro. Distal radial fractures are a commonly encountered fracture & anatomical reduction is the standard. Dorsal angulation is the traditional method of assessment but is inaccurate in rotated lateral xrays. Previously a relationship has been demonstrated between the dorsal cortex (DC) of the radius & the superior pole of the lunate (SL) & its sensitivity for assessing dorsal angulation & translation. Hypothesis. A constant anatomical relationship maintained between the DC and the SL when rotated up to 30 degrees from standard lateral?. Methods. MRI scans of 28 wrists including the distal third of the radius to the proximal carpal row. Beginning 5cm proximal to the distal radius articular surface, a line was superimposed upon the DC extending distally through the metaphysis. Lunate height (LH) & distance from the DC line to the SL (DC-SL) were measured at 5-degree rotational increments around the radial shaft central axis to 30 degrees of supination & pronation (S+P). The DC-SL/LH ratio was compared to 0 degrees (anatomical lateral) using the two-tailed paired student t-test. Results. No significant difference in DC-SL:LH between 0 degrees of rotation and any 5-degree increment up to 30 degrees of S+P (lowest p=0.075). The DC line lay consistently dorsal to the SL. Conclusion. A constant DC-SL relationship is maintained with up to 30 degrees of S+P. This reference can be quickly and accurately used to assess DRF reduction in poorly-taken films with malrotation

Bone bruising of the scaphoid is a common term reported, when MRI imaging is carried out for continued pain, within the anatomical snuff box. Is this significant? Our aim was to ascertain if bone bruising lead to continued symptoms, and resulted in delayed fracture detection- an occult fracture. This was a prospective study looking at 170 patients with scaphoid injuries. Of the 170 scaphoid injuries identified there were 120 scaphoid fractures seen on scaphoid view radiographs. The remaining 50 had no fracture on radiographs, however were clinically symptomatic and had MRI scaphoid imaging which demonstrated various grades of bone bruising. All were treated in a scaphoid plaster and re-examined at 8 weeks. There 4 were patients that remained symptomatic, MRI scan were performed which revealed 3 with resolving scaphoid bone bruising and 1 with a scaphoid fracture (p-value=0.05). Two further weeks of immobilisation resolved the symptoms of those 4 patients. Therefore occult scaphoid fractures demonstrating only bone bruising may take up to 8 weeks to declare itself as a fracture. Immobilisation in a scaphoid cast should be the mainstay of treatment for a minimum period of 8 weeks

Objective. Delayed radiographs are routinely done to help in diagnosis of occult scaphoid fractures. Our aim was to determine the diagnostic value of these late x-rays. Methods. This is a radio-diagnostic study. We prospectively reviewed radiographs of 67 patients with injury to their wrists who presented with anatomical snuff box to the accident and emergency department.5 patients showed up a fracture of the scaphoid on trauma x-rays and they were excluded from the study. All patients had a radiograph on day of presentation as well as a delayed radiograph at a later date. The radiographs were standardized to include 4 scaphoid views. All the radiographs were reported independently by a consultant radiologist (JN) and a consultant orthopaedic surgeon (ML). Results. 62 radiographs of 42 males and 20 females with an average age of 25.91 were examined. The two sequential radiographs were taken at an average delay of 10.23 days. There was no difference of opinion between the radiologist and the orthopaedic surgeon with regards to reporting. Only one of the late radiographs showed up a fracture of the proximal pole. Rest of the x-rays failed to detect any bony injury. Conclusion. If a fracture is not visible on first day it is difficult to visualize the fracture in delayed x-rays and a strong clinical suspicion should be supplemented with a more specific investigation like a bone scan or MRI scan. We present our data with an up to date review of literature

Counter-insurgency warfare in recent military operations has been epitomised by the use of Improvised Explosive Devices (IED) against coalition troops. Emerging patterns of skeletal fractures, limb amputations and organ injuries, which are caused by these weapons have been described over recent years. This paper describes a retrospective case series of knee dislocations caused by IEDs in recent conflict. Data was obtained about military personnel from 2006 to 2011, who had sustained a knee dislocation while serving in Afghanistan from a prospectively gathered database, the Joint Theatre Trauma Registry (JTTR), maintained by the Academic Department of Military Emergency Medicine, Royal Centre for Defence Medicine. The diagnosis of knee dislocation and its associated skeletal injuries was assessed by review of all relevant plain radiographs, computed tomography scans and magnetic resonance images. The mechanism of injury, incidence of vascular injuries and other skeletal injuries was recorded. During the study period, 23 casualties sustained a knee dislocation caused by an IED. Four casualties had an associated popliteal vascular injury. Eleven injuries were caused in enclosed spaces, and 10 injuries caused by IEDs out in the open. Anterior dislocations were common in the group caused in enclosed spaces. 19/20 patients had at least one other skeletal fracture. Knee dislocations represent an uncommon but important diagnosis in modern warfare. Urgent and careful assessment for any associated vascular injuries or other skeletal injuries may help ensure timely treatment and promote future recovery. Mitigation against knee dislocation may be possible in the enclosed environment because of the predictable pattern of injury

Introduction. The incidence of spondylolysis is estimated about 5–6% in the general population and accounts for one of the most frequent cause of backpain in the adolescent. The purpose of this study is to present our results from the management of these patients. Patients and Methods. During the period 1993–2003, 25 children with spondylolysis and spondylolisthesis were managed in our department. Apart from radiographic studies, in cases with a history of acute trauma, a bone scan as well as a CT or MRI scan were performed. There were 13 male and 12 female patients with a mean age of 10.5 years (5–14 years). There were 15 cases of spondylolysis, one at L3 level, 3 at L4 and 11 at L5. 10 patients had spondylolisthesis, 8 of the isthmic type and 2 of the dysplastic type. THe mean follow up of the patients was 6.5 years. Results. In 24 cases the management was conservative with bedrest until the symproms subsided. Following symptoms resolution a brace was fitted, depending on the case, for 3–6 months. In one case of Grade II spondylolisthesis with nerve root irritation a posterolateral arthrodesis according to Wiltse was performed, following failure of a prolonged period of conservative management. The results of our patients were evaluated clinically and radiologically according to Seitsalo et al and they were in all cases excellent or good, with full return of the affected children to their previous activities. Conclusion. In conlusion, spondylolysis and spondylolisthesis is managed conservative in children with good results. Rarely in cases were the symptoms persist despite conservative management, surgical treatment can provide a good result

Background. The long-term impact of dividing Piriformis when performing a standard posterior approach to the hip has not been assessed. A less invasive approach in which the tendon is preserved has been described (the Piriformis-sparing minimally invasive [PSMI] approach). With advances in MRI technology it is now possible to image structures in close proximity to metal without artifact. The aim of the study was to compare the MRI features (muscle grade and bulk) of the divided and repaired Piriformis tendon group (by the standard posterior approach) with the preserved tendon group (by the PSMI approach). Methods. As part of an on-going randomized controlled trial comparing the PSMI approach with the standard posterior approach for total hip replacement, a subgroup of 20 consecutive patients who fulfilled the inclusion criteria were recruited. Patients received preoperative and 3 months and 2 year postoperative MRI scans. Patients and evaluators were blinded to allocation. Outcomes assessed included grade, volume and integrity of Piriformis. Results. There was significantly less deterioration in muscle grade (p = 0.002) and bulk (p = 0.013) in the preserved Piriformis tendon group in comparison to the divided and repaired Piriformis group. There was equal deterioration in muscle grade and bulk of all divided tendons (Obturator Internus and Piriformis by the standard approach and Obturator Internus by the PSMI approach). The majority (10/11) of the Piriformis tendons by the PSMI approach were intact post-operatively. Conclusions. The PSMI approach, in which the Piriformis tendon is preserved, is successful in maintaining the integrity of the tendon as well as preventing deterioration in grade and bulk of the muscle belly

Background. Tears of the rotator cuff are a common pathology and poorly understood. Achieving a good functional outcome for patients may be difficult, and the degree of fat infiltration into the muscle is known to be a major determining factor to surgical repair and post operative function. It is the hypothesis of this study that the degree of retraction of the common central tendon as seen on MRI corresponds to the amount of fat infiltration classified according to the Goutallier grading System. Methods. MRI scans of the supraspinatus were reviewed and two groups identified: no tear (NT) and full thickness tear (FTT). The following measures were taken: central tendon retraction (CTR) and the Goutallier Grade according to MRI. The difference between Goutallier grade between NT and FTT were measured using the Mann-Whitney test. The relationship between Goutallier grade and increasing amount of CTR was described using Spearman's rank correlation and differences assessed using Mann-Whitney tests. Results. 143 scans had NT and 148 scans had FTT after exclusion and inclusion criteria were satisfied. All FTT involved the central tendon, with varying retraction. 143 in the NT group were Goutallier Grade 0–1. FTT revealed 2 Grade 0, 21 Grade 1, 35 Grade 2, 14 Grade 3, 76 Grade 4. The difference in Goutallier grade between the NT and FTT was highly significant (p<0.001). The increase in Goutallier grade associated with increasing retraction of the central tendon was also highly significant p<0.001. Conclusion. CTR can be directly linked to Goutallier grading and as such may help to determine surgical intervention between groups. Level of Evidence. Level 1 Diagnostic Study

Background. Fractures of the scaphoid are uncommon in the paediatric population. Despite their rarity a significant number of children are referred to the fracture clinic for a suspected scaphoid fracture. The aim of this study is to report on the incidence and pattern of injury of the paediatric scaphoid fracture and present a new classification. Methods. An analysis of all paediatric scaphoid fractures treated in the Royal Hospital for Sick Children, Edinburgh (age up to 14 years old) over a five year period. The case notes, radiographs and were applicable MRI scan for these patients were reviewed. The clinical information recorded included the dominant hand, mechanism of injury, clinical features on examination, type of cast and length of period, stiffness following cast removal and evidence of delayed or non union. Each radiograph was analysed independently and fracture classified according to a new classification system. Results. 56 patients out of the eight hundred and thirty eight (6.7%) referred were identified who had a confirmed diagnosis of a scaphoid fracture on both clinical and radiological assessment. This group consisted of 39 males (70%) and 17 females (30%). The average age of incidence in males was 12.2 years (range 11 to 13 years) and females was 10.3 years (range 9 to 10 years). There were no scaphoid fractures seen in males below the age of 11 years and in females below the age of 9 years. The commonest type of injury was a distal pole fracture (33 patients). One patient sustained a proximal pole fracture and went onto develop a non-union. Conclusions. Scaphoid fractures in children have distinct epidemiological features. The majority involve the distal third of the scaphoid and heal with conservative treatment. The use of a new classification system specific to the paediatric population is beneficial when determining the optimal management of this type of injury