Regional transient osteoporosis of the foot and vitamin C deficiency.

We describe the clinical presentation and diagnostic tests of a patient with regional transient osteoporosis (RTO) of the foot. This patient presented with a 4-month history of left-foot pain, nonpitting edema, and brownish discolorations of both feet. He had a history of tobacco abuse, alcohol abuse, and malnutrition. Radiological studies revealed severe osteopenia in the feet, and a MRI revealed bone marrow edema. The bone biopsy was consistent with RTO. This patient also had vitamin C deficiency. This case suggests a link between vitamin C deficiency and RTO, a hypothesis supported by our review of relevant literature on osteoporosis and vitamin C.