Iselin disease is a rare cause of pain on the lateral side of the foot in youngsters and teenagers. This condition is an osteochondral disorder or traction apophysitis in the base of the fifth metatarsal metatarsal. The peroneal tendons tendon connects on the site and places the metatarsal with a lot of strain. https://podiatrynewyorkcity.com/iselins-disease-of-the-fifth-metatarsal/