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The Journal of Bone and Joint Surgery 78:775-8 (1996)
© 1996 The Journal of Bone and Joint Surgery, Inc.

Bilateral Primary Cystic Arthrosis of the Acetabulum. A Case Report*

SCOTT I. SILAS, M.D.{dagger}, CHARLES S. RESNIK, M.D.{ddagger} and ALAN M. LEVINE, M.D.{ddagger}, BALTIMORE, MARYLAND

Investigation performed at the University of Maryland, Baltimore


   Introduction
 
There is considerable controversy about whether cystic arthrosis is a primary or secondary phenomenon in the development of degenerative joint disease of the hip1,2,4,5,8,10,13,15,18. Proponents of the bone-contusion theory have suggested that a localized area of subchondral necrosis of bone resulting from repetitive microtrauma leads to cystic degeneration, leaving the articular cartilage intact1,2,4,8,13,18. Proponents of the synovial intrusion theory believe that traumatic defects in the articular cartilage allow intrusion of synovial fluid through subchondral microfractures, resulting in cystic degeneration5,10,15. Both groups of proponents agree that, in the later stages of degenerative osteoarthrosis of the hip, subchondral fractures, cystic collapse of the acetabulum, and diffuse degenerative changes predominate on both sides of the joint. Both groups also agree that it should be possible to slow the progression of the disease by timely and appropriate operative intervention.

Often, by the time patients who have pain in the hip secondary . . . [Full Text of this Article]


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