title: PET/CT imaging of gastrointestinal stromal tumor with calcified peritoneal implants after imatinib therapy.
abstract: Calcified tumor mass is an unusual feature of gastrointestinal stromal tumor (GIST) at initial presentation. However, it may develop after imatinib therapy and be erroneously attributed to a second primary malignancy. A 56-year-old woman with a 4.5-year history of metastatic GIST presented to our institution for PET/CT imaging at baseline and at 3 and 15 months after imatinib therapy. Serial PET/CT images demonstrated increasing calcification in peritoneal implants on CT and increasing FDG activity.
authors.affiliation: Department of Radiology, Division of Nuclear Medicine, Stanford University Medical Center, Stanford, California, USA.
authors.forename: Hedieh K
authors.initials: HK
authors.lastname: Eslamy
authors.forename: Andrew
authors.initials: A
authors.lastname: Quon
mesh_terms: D000970:Antineoplastic Agents / Q000009:adverse effects; D001549:Benzamides; D002114:Calcinosis / Q000139:chemically induced* / Q000150:complications / Q000000981:diagnostic imaging*; D005260:Female; D019788:Fluorodeoxyglucose F18; D046152:Gastrointestinal Stromal Tumors / Q000150:complications / Q000000981:diagnostic imaging*; D006801:Humans; D000068877:Imatinib Mesylate; D008875:Middle Aged; D010537:Peritoneum / Q000000981:diagnostic imaging*; D010879:Piperazines / Q000009:adverse effects*; D049268:Positron-Emission Tomography; D019736:Prostheses and Implants; D011743:Pyrimidines / Q000009:adverse effects*; D014057:Tomography, X-Ray Computed
chemical_list: D000970:Antineoplastic Agents; D001549:Benzamides; D010879:Piperazines; D011743:Pyrimidines; D019788:Fluorodeoxyglucose F18; D000068877:Imatinib Mesylate