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Knochenzysten des Hüftpfannendaches

Subchondral cysts of the iliac acetabulum

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Summary

Subchondral solitary bone cysts occur, as well as in numerous other places in the skeletal system, also in the roof of the acetabulum. These cysts differ from typical arthrosis growelcysts in form, position and X-ray appearances. They can be found in hips otherwise normal on X-ray examination (Group 1), or in the presence of prearthrosis or arthrosis (Group 11). The clinical features and the pathological anatomy of this form of bone cysts are discussed, as well as its aetiology. The pain precipitated by these cysts is very favorably affected by operative filling of the cyst with autologous spongiosa, as shown by follow up of the 19 operations done by the authors. These operations were done on an average 7 years previously. The result was good or satisfactory in 17 out of these 19 cases. The 2 treatment failures were due to wrong indication for operation — the simultaneous arthrosis was already to advanced.

The authors prefer for this operation the Watson Jones approach and recommend, if a large aceta-bulum-roof-cyst is present, immediate filling of the cyst also if an intertrochanteric osteotomy is done at the same time because of prearthrosis or arthrosis.

Zusammenfassung

Wie an zahlreichen anderen Stellen im Skelettsystem, kommen auch im Hüftpfannendach subchondrale solitäre Knochenzysten vor, die sich von den typischen Arthrose-Geröllzysten in Form, Lage und röntgenologischem Aussehen unterscheiden. Sic sind bei röntgenologisch normalem Hüftgelenk (Grup pe I) oder bei gleichzeitig vorhandener Praearthrose/Arthrose (Gruppe 11) zu finden. Klinik und Pathologische Anatomie dieser Form von Knochenzysten werden besprochen und ihre Ätiologie diskutiert. Therapeutisch sprechen die von den Zysten ausge lösten Schmerzen sehr gut auf die operative Zysten plombierung mit autologer Spongiosa an, wie bei einer Nachuntersuchung der 19 Operationen der Autoren festzustellen ist, die im Mittel 7 Jahre p.o. vorgenommen wurde: in 17 von 19 Fallen war das Ergebnis gut oder befriedigend. Die 2 MiBerfolge sind auf falsche Indikationsstellung zurückzuführen; hier war die gleichzeitige Arthrose bereits zu weit fort geschritten.

Die Autoren bevorzugen für die Operation den Zugang nach Watson-Jones and empfehlen, falls eine größere Pfannendachzyste vorliegt, auch bei inter trochanteren Osteotomien wegen Praearthrose/Arthrose die Zyste gleichzeitig zu plombieren.

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Beffa, X., Dick, W. & Morscher, E. Knochenzysten des Hüftpfannendaches. Arch. Orth. Traum. Surg. 91, 259–265 (1978). https://doi.org/10.1007/BF00389608

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  • DOI: https://doi.org/10.1007/BF00389608

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