Macrodystrophia lipomatosa with syndactyly.

Macrodystrophia lipomatosa (MDL) is a rare form of congenital localized gigantism characterized by hypertrophy of all mesenchymal tissues of the affected digits, with particular overgrowth of fat. Syndactyly is a rare association. We report a case of MDL associated with syndactyly affecting the hand. We describe the characteristic radiographic and MRI findings that distinguish the abnormality from other causes of localized gigantism.