Primary leiomyosarcoma of the omentum.
D005260:Female; D006801:Humans; D007890:Leiomyosarcoma / Q000473:pathology*; D008113:Liver Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009852:Omentum; D010534:Peritoneal Neoplasms / Q000473:pathology*; D013274:Stomach Neoplasms / Q000473:pathology*