“…Seitaro IGUCHI 1) , Bassam ALCHI 1) , Katsuaki ASAKAWA 1) , Daisuke IZUMI 2) , Takeshi KASHIMURA 2) , Mitsuhiro UENO 1) , Farah SAFAR 3) , Shinichi NISHI 1) , Ichiei NARITA 1) , and Fumitake GEJYO 1) Introduction Leiomyosarcoma is a rare malignant tumor originating from the smooth muscle cells. Vascular leiomyosarcoma constitutes about 2% of all leiomyosarcomas and involves veins five times more than arteries (1,2).…”