First MTP joint 'turf toe' injury.
- Rupture of the first MTP joint plantar plate / intersesamoid ligament.
- Osteochondral injury and bony contusion of the plantar medial aspect of the first metatarsal head directly adjacent to the distal aspect of the medial sesamoid.
- Avulsion of the distal attachment of the dorsal capsule of the first metatarsophalangeal joint allowing slight plantar subluxation of the proximal phalanx.
- Background degenerative disease within the first MTP joint.