Objectives. We evaluated the accuracy of augmented reality (AR)-based navigation assistance through simulation of
Amputation was once widely practised for primary
Aims. Resection of the proximal humerus for the primary malignant bone
tumour sometimes requires en bloc resection of the
deltoid. However, there is no information in the literature which
helps a surgeon decide whether to preserve the deltoid or not. The
aim of this study was to determine whether retaining the deltoid
at the time of resection would increase the rate of local recurrence.
We also sought to identify the variables that persuade expert surgeons
to choose a deltoid sparing rather than deltoid resecting procedure. Patients and Methods. We reviewed 45 patients who had undergone resection of a primary
malignant tumour of the proximal humerus. There were 29 in the deltoid
sparing group and 16 in the deltoid resecting group. Imaging studies
were reviewed to assess tumour extension and soft-tissue involvement.
The presence of a fat rim separating the tumour from the deltoid
on MRI was particularly noted. The cumulative probability of local
recurrence was calculated in a competing risk scenario. Results. There was no significant difference (adjusted p = 0.89) in the
cumulative probability of local recurrence between the deltoid sparing
(7%, 95% confidence interval (CI) 1 to 20) and the deltoid resecting
group (26%, 95% CI 8 to 50). Patients were more likely to be selected
for a deltoid sparing procedure if they presented with a small tumour
(p = 0.0064) with less bone involvement (p = 0.032) and a continuous
fat rim on MRI (p = 0.002) and if the axillary nerve could be identified
(p = 0.037). Conclusion. A deltoid sparing procedure can provide good local control after
resection of the proximal humerus for a primary malignant
We investigated the functional outcome in patients
who underwent reverse shoulder replacement (RSR) after removal of
a tumour of the proximal humerus. A total of 16 patients (ten women
and six men) underwent this procedure between 1998 and 2011 in our
hospital. Five patients died and one was lost to follow-up. Ten
patients were available for review at a mean follow-up of 46 months
(12 to 136). Eight patients had a primary and two patients a secondary
bone tumour. At final follow up the mean range of active movement was: abduction
78° (30° to 150°); flexion 98° (45° to 180°); external rotation
32° (10° to 60°); internal rotation 51° (10° to 80°). The mean Musculoskeletal
Tumor Society score was 77% (60% to 90%) and the mean Toronto Extremity
Salvage Score was 70% (30% to 91%). Two patients had a superficial
infection and one had a deep infection and underwent a two-stage
revision procedure. In two patients there was loosening of the RSR;
one dislocated twice. All patients had some degree of atrophy or
pseudo-atrophy of the deltoid muscle. Use of a RSR in patients with a tumour of the proximal humerus
gives acceptable results. Cite this article:
Aims. This study aimed to analyze the accuracy and errors associated with 3D-printed, patient-specific resection guides (3DP-PSRGs) used for
Aims. The proximal tibia (PT) is the anatomical site most frequently affected by primary
Aims. Iliac wing (Type I) and iliosacral (Type I/IV) pelvic resections for a primary
INTRODUCTION.
Recently, several preliminary reports have been issued on the application of computer assistance to
Aims. We present a retrospective review of patients treated with extracorporeally
irradiated allografts for primary and secondary
Primary
Primary
Needle biopsy is an established technique for the histological diagnosis of
Background:The study aimed to analyse the demographic, clinical, and histological features of patients with a malignant primary
Between 1988 and 2006, 18 patients had a custom-made endoprosthetic replacement of the distal humerus for
Introduction: Only 4–13 % of all spine tumours are primary
The surgical treatment of
Endoprosthetic replacement of the distal tibia and ankle joint for a primary
INTRODUCTION. We conducted a review of the Leeds Regional
We report our experience with a new technique for cryosurgical ablation of