Condition	Clinical presentation	Radiologic findings
Arthritis	Fatigue; joint deformity; joint pain that is often symmetrical; swelling	Erosion; fragmentation; joint space narrowing; soft-tissue swelling
Avascular necrosis of the metatarsal head (Freiberg's disease)	Pain, tenderness, swelling, and limitation of motion in the affected metatarsophalangeal joint	Collapse, cystic changes, and flattening of the metatarsophalangeal joint; sclerosis
Morton's neuroma	Often asymptomatic; pain in the involved web space that often radiates to the toes	Mass in intermetatarsal space
Painful accessory bones	Accessory tarsal navicular bones occur at the medial and posterior margins of the tarsal navicular, and os trigonum occurs adjacent to the posterior margin of the talus; pain and tenderness in the affected area	Marrow edema; presence of ossicle
Plantar fasciitis	Plantar heel pain	Fascial tear; marrow edema; plantar calcaneal spur
Reflex sympathetic dystrophy	Diminished motor function; pain and tenderness; swelling; vasomotor instability	Diffuse osteopenia; increased tracer uptake
Stress fracture	Limitation of motion; pain and tenderness in affected area	Callus formation; fracture line; periosteal reaction
Tarsal coalition	Bilateral in 50 percent of patients; restricted subtalar motion; rigid, painful flatfoot; valgus deformity of the hindfoot	C sign; flattening and broadening of the lateral talar process; narrowing of the talocalcaneal joint; talar breaking
Tarsal tunnel syndrome	Diffuse burning pain and paresthesias along the plantar surface of the foot and toes	Mass in the tarsal tunnel; synovial hypertrophy in tarsal tunnel