Ortho Dx: Toe pain in a runner

A 35-year-old man complains of right great toe pain for several months. He is very active and enjoys running. On examination, he has pain and limited dorsiflexion of the first metatarsophalangeal (MTP) joint. Pain is felt with passive hyperdorsiflexion, but otherwise range of motion of the toe is nonpainful. Anteroposterior and lateral radiographs of the right foot ...