title: Gastric recurrence of a primary colon plasmacytoma: staging and evaluating response to therapy with 18F-FDG PET/CT.
abstract: A 53-year-old male with a remote history of colon adenocarcinoma presented with weakness, severe anaemia and an actively bleeding ulcerated lesion in the stomach. An 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT showed FDG-avid masses in the stomach and mesentery, which were biopsied to reveal an unsuspected diagnosis of plasmacytoma. The original colon tumour pathology was identical and this prompted its re-evaluation to a primary colon plasmacytoma. The patient was treated with chemotherapy and a follow-up PET/CT scan showed complete resolution of the gastric and mesenteric masses. 18F-FDG PET/CT is useful in the restaging and follow-up of this very rare extramedullary plasmacytoma.
authors.affiliation: Department of Nuclear Medicine, Brandon Regional Health Centre, Brandon, MB, Canada. makisw79@yahoo.com
authors.forename: W
authors.initials: W
authors.lastname: Makis
authors.forename: A
authors.initials: A
authors.lastname: Ciarallo
authors.forename: M
authors.initials: M
authors.lastname: Hickeson
authors.forename: R
authors.initials: R
authors.lastname: Lisbona
mesh_terms: D003110:Colonic Neoplasms / Q000473:pathology*; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D008875:Middle Aged; D064847:Multimodal Imaging; D009367:Neoplasm Staging; D010954:Plasmacytoma / Q000000981:diagnostic imaging* / Q000556:secondary*; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary*; D014057:Tomography, X-Ray Computed
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18