title: A predominant pelvic gastrointestinal stromal tumor (GIST) mass observed on Tc-99m red blood cell gastrointestinal bleeding scintigraphy.
abstract: A 51-year-old woman presented with recurrent bleeding per rectum. Her earlier endoscopies were negative. Tc-99m RBC GI bleeding scintigraphy was performed. It demonstrated an apparent hypervascular pelvic mass, and active small bowel bleeding. Based on scintigraphic finding of a predominant pelvic mass indicating tumor, CT of the abdomen and pelvis was performed for further gastrointestinal bleeding localization work up instead of an invasive angiography or endoscopy, which detected a small bowel tumor in the pelvis. A small bowel gastrointestinal stromal tumor was resected subsequently.
authors.affiliation: Department of Nuclear Medicine and PET, Singapore General Hospital, Outram Road, Singapore. rsood@sbcglobal.net
authors.forename: Ravi
authors.initials: R
authors.lastname: Sood
authors.forename: Shang Ian
authors.initials: SI
authors.lastname: Tee
mesh_terms: D004912:Erythrocytes / Q000000981:diagnostic imaging*; D005260:Female; D046152:Gastrointestinal Stromal Tumors / Q000097:blood* / Q000000981:diagnostic imaging* / Q000473:pathology / Q000503:physiopathology; D006470:Hemorrhage / Q000000981:diagnostic imaging*; D006801:Humans; D008875:Middle Aged; D015609:Organotechnetium Compounds; D010388:Pelvis / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology*; D011877:Radionuclide Imaging
chemical_list: D015609:Organotechnetium Compounds