Abstract
A 61-year-old man receiving treatment for diabetes mellitus and hypertension had a history of callus formation on the sole of his left foot which had been surgically removed 20 years previously. About three years before this presentation he noticed a nodule causing pain on pressure at the site from which the callus had been removed. Thereafter, similar nodules occurred on the soles of both his feet. The nodules were skin colored, ranging from 2 cm to 4 cm in size. Neither contracture at the toes nor nodules on the fingers were detected. A histological examination revealed, a well-defined mass of fibers with fibroblast proliferation. The mass involved the dermis and aponeurosis. We made a diagnosis of plantar fibromatosis and thus resected the fibromatous lesions, including the aponeurosis, circumferentially. Full thickness skin grafting was performed. We consider diabetes mellitus to have been a causal factor in the development of plantar fibromatosis in this case.
