G ANGRENE of an extremity caused by venous occlusion without associated arterial occlusion is uncommon. Haimovicil noted that Fabricus Hildanus, in 1593, apparently recognized the possibility of gangrene of venous origin; it was not until 1859, however, that Heuter2 reported a case, giving an excellent account of the clinical and pathologic criteria of this type of gangrene. Gregoire,3 in 1938,...