Venous ulceration in males with sex chromosome abnormalities.

Two patients with Klinefelter's syndrome and three with 47,XYY who had venous ulcers, and one patient with 47,XYY and a post thrombotic limb are described. Sex chromosome abnormalities should be suspected in tall males with leg ulcers, especially those who have no progeny and are relatively young. Venous ulcers may be more common in males with 47,XYY.