A 28-year-old female patient presents with pain in the left forefoot that began after a long hike on a mountainous trail. There is no history of trauma. Physical examination reveals nontender range of motion of the metatarsophalangeal joints. Deep palpation of the intermetatarsal spaces does not reproduce the patient's symptoms; however, palpation along the second metatarsal is painful. Which of the following is the most likely diagnosis?
1) Intermetatarsal space neuroma in continuity
2) Capsulitis of the second metatarsophalangeal joint
3) Stress fracture of the second metatarsal
4) Degenerative joint disease of the second metatarsophalangeal joint
