Stress fractures of the ankle and forefoot in patients with inflammatory arthritides.

Twenty-four stress fractures occurring in the metatarsal bones and ankle region were examined in 17 patients with inflammatory arthritides. There were 16 metatarsal, four distal fibular, two distal tibial, and two calcaneus fractures. Radiographic analyses were performed to determine the presence of possible predisposing factors for stress fractures. Metatarsal and ankle region stress fractures were analyzed separately. Stress fractures occurred most frequently in the second and third metatarsals. In metatarsal fractures, there was a trend for varus alignment of the ankle to cause fractures of the lateral metatarsal bones and valgus alignment of the medial metatarsal bones. Valgus deformity of the ankle was present in patients with distal fibular fractures in the ankle region group. Calcaneus fractures showed neutral ankle alignment. Malalignment of the ankle and hindfoot is often present in distal tibial, fibular, and metatarsal stress fractures. Additionally, patients tend to have long disease histories with diverse medication, reconstructive surgery and osteoporosis. If such patients experience sudden pain, tenderness, or swelling in the ankle region, stress fractures should be suspected and necessary examinations performed.