L. Vanpaemel et al., DESTRUCTIVE SYNOVITIS IN CONTRALATERAL PERTHES-DISEASE - A REPORT OF 2 CASES, Acta orthopaedica Scandinavica, 65(6), 1994, pp. 585-588
2 boys had unilateral Perthes' disease at the age of 5 years. After 6
and 7 years, respectively, both patients developed contralateral femor
al head necrosis with rapid destruction leading to ankylosis of the hi
p. Histology of the synovium showed nonspecific synovitis. Both patien
ts fulfilled criteria for oligo-articular juvenile chronic arthritis (
JCA). The association with Perthes' disease suggests a common etiology
.