Benign fibrohistiocytic tumour of retroperitoneum or peritoneumBenign neoplasm of mesenteryBenign neoplasm of mesocolonBenign neoplasm of omentumBenign neoplasm of parietal peritoneumBenign neoplasm of pelvic peritoneumBenign neoplasm of perirenal tissueBenign neoplasm of peritoneumBenign neoplasm of rectouterine pouchBenign neoplasm of retroperitoneumbenign neoplasm of Douglas pouchbenign neoplasm of Pouch of Douglasbenign neoplasm of retroperitoneal tissuebenign peritoneal neoplasmbenign retroperitoneal neoplasmbenign retroperitoneal tumourbenign tumour of peritoneum