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01.11.2010 | Symposium: Highlights of the ISOLS/MSTS 2009 Meeting | Ausgabe 11/2010

Clinical Orthopaedics and Related Research® 11/2010

The Survivorship of Protrusio Cages for Metastatic Disease Involving the Acetabulum

Zeitschrift:
Clinical Orthopaedics and Related Research® > Ausgabe 11/2010
Autor:
MD Mark Clayer
Wichtige Hinweise
The author certifies that he has no commercial associations (eg, consultancies, stock ownership, equity interest, patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article.
Each author certifies that his or her institution approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research and that informed consent for participation in the study was obtained.

Abstract

Background

Metastatic disease commonly affects the proximal femur and occasionally the acetabulum. Surgical options include the use of a protrusio cage with a THA. However, the complications and survivorship of these cages for this indication is unknown.

Questions/purposes

The purpose was to report the restoration of function, complications and implant survival.

Methods

The medical records of 29 patients undergoing insertion of a protrusio cage for metastatic pelvic disease were reviewed. Complications were recorded. The most common diagnosis was metastatic breast cancer. During the review process, all but 10 of the 29 patients died 1–73 months after surgery. The median length of survival was 12 months (range, 3 days–100 months) after the procedure; 11 patients were alive at last followup at a median of 16 months (range, 1–100 months).

Results

One patient had loss of fixation owing to disease progression. Five patients had dislocations, four of which were treated. There were three deep infections (two that led to dislocation, which proceeded to revision surgery). Ten patients of the 29 patients became household ambulators, 17 became community ambulators, two remained chair-bound, and one bed-bound.

Conclusions

The protrusio cage allowed most patients to return to walking with only one mechanical failure.

Level of Evidence

Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.

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