Reconstruction with a double-constrained implant design after complex shoulder extra-articular resection.

Background: Approximately, one-third of patients with tumors of proximal humerus will require an extra-articular resection to achieve oncologic margins. This procedure yields poor functional outcomes with a considerable rate of revisions. Unconstrained implants are prone to instability hindering also function of the elbow and hand, whereas constrained shoulder reconstructions suffer from early aseptic loosening of the glenoid component due to bone overload.

A quantitative CT analysis of fibula inlayed in a massive allograft for femoral diaphysis reconstruction.

Introduction: In diaphyseal reconstructions for bone tumor resection, massive bone allografts (MBA) are historically regarded as the gold standard. However, these are not without complications, and they present an elevated risk of infection, nonunion and structural failure that increases over time as the graft remains largely avascular. To counteract this disadvantage, a combination of allograft with a vascularized fibula has been proposed.

[Modified Harrington Procedure in the Treatment of Extensive Tumor Defects of the Acetabulum].

PURPOSE OF THE STUDY The increasing prevalance of patients with metastatic bone cancer and their improved survival puts more emphasis on the quality of treatment of bone metastases. Although most pelvic lesions are treated non-operatively, extensive destruction of the acetabular segment poses a therapeutic challenge. A potential treatment option may be the modified Harrington procedure.

[Surgical Treatment of Tuberculous Spondylodiscitis].

PURPOSE OF THE STUDY The paper presents a monocentric retrospective study of patients treated surgically for spinal tuberculosis. Clinical and radiological results are analysed, early and late complications are recorded. The study aims to answer the following questions.

[Surgical Treatment of Sacral Chordoma].

PURPOSE OF THE STUDY The retrospective study of patients treated for sacral chordoma with respect of complications, clinical outcomes and longterm survival is presented. Three main hypotheses have been formulated. Hypothesis 1: survival of patients with respect to generalization of the disease, manifestation of local recurrence and metastases with a R0 resection margin achieved is longer than survival of patients with a R1 or R2 resection margin.