Left big toe numbness, dorsum. Nerve entrapment? There is mild nonenhancing edema within the subcutaneous fat dorsal to the bases of the third and fourth metatarsals extending into the midfoot, but I see no mass or other findings to that would cause nerve entrapment or otherwise result in the patient's symptoms of dorsal big toe numbness. There is mild enhancement at the insertion of the anterior tibialis tendon on the which may reflect a mild enthesitis, but this is of questionable clinical significance. Mild osteoarthritis affects the first metatarsophalangeal joint, but the great toe is otherwise normal. There is a bipartite medial sesamoid bone beneath the first metatarsal head, a normal variant. Mild osteoarthritis also affects the first tarsometatarsal joint. The lesser toes are unremarkable. I see no findings to suggest a stress fracture. The musculature of the foot is normal.
Minimal dorsal subcutaneous edema, mild osteoarthritis, and possible mild enthesitis at the tibialis anterior insertion, but I see no mass or other specific findings to account for the patient's left big toe numbness.