A Rare Case of Vascular Leiomyosarcoma Originating from a Branch Vessel of the External Iliac Vein

Figure 3

(a) There were thick blood vessels, which were thought to be branching vessels (white arrowheads) of the left external iliac vein (black arrowhead). (b) Immunostaining for CD31 was positive, and we could identify the vascular endothelium. (c) The tunica media and tunica externa of this vascular wall were diminished and completely replaced by tumor cells. (d) The vessel intima was completely replaced by tumor cells, and the vessel wall structure was diminished.

(a)

(b)

(c)

(d)