A 48 years old male presenting with a painless tumor of the right thig
h is reported. An initial surgical excision showed that the tumor was
joint to the saphenous vein, The histopathological study showed that i
t was a venous vascular leiomyosarcoma of intermediate degree of malig
nancy. The patients was re-operated performing a resection of the abdu
ctor muscle and two weeks later was subjected to radiotherapy (50 Gray
) The only postoperative sequel was a moderate lymphedema of the right
limb. This is the firs reported case in the Chilean literature.