title: Left hydronephrosis due to retroperitoneal barytoma.
mesh_terms: D001466:Barium Sulfate; D005119:Extravasation of Diagnostic and Therapeutic Materials / Q000150:complications*; D006801:Humans; D006869:Hydronephrosis / Q000209:etiology*; D007416:Intestinal Perforation / Q000150:complications*; D008297:Male; D008875:Middle Aged; D012002:Rectal Diseases / Q000150:complications*; D012187:Retroperitoneal Space
chemical_list: D001466:Barium Sulfate