The plantar plate of the lesser metatarsophalangeal joints: potential for injury and role of MR imaging.

This article reviews the normal anatomy of the plantar plate and surrounding support structures at the lesser metatarsophalangeal joints, and demonstrates degenerative change and rupture using high resolution MR imaging of the forefoot. The etiology of plantar plate and collateral ligament degeneration and rupture, most commonly occurring at the second metatarsophalangeal joint, is discussed as it relates to chronic synovitis and instability. Both conservative and surgical treatment options are discussed.