Legg-Calvé-Perthes disease (LCPD): avascular necrosis (AVN) of the proximal femoral head. The disease is usually insidious in onset and may occur after an injury to the hip.
Hill-Sachs lesion (1940) Cortical depression of posterolateral head of the humerus related to impaction of the humeral head
Georg Clemens Perthes (1869 – 1927) was a German surgeon. Legg-Calvé-Perthes disease (1910); the Bankart shoulder repair and Perthes test