title: PET-Negative Gastrointestinal Stromal Tumors.
abstract: Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal malignancy of the gastrointestinal tract. PET/CT is a common diagnostic tool and is also used for therapy monitoring. GISTs typically show strong (18)F-fluorodeoxyglucose (FDG) uptake. Here we present two cases of GIST with unusually low/negative FDG uptake. FDG negativity does not preclude the diagnosis of a GIST.
authors.affiliation: Department of Oncology, Kantonsspital Winterthur, Winterthur, Chur, Switzerland.
authors.forename: Anja
authors.initials: A
authors.lastname: Williams
authors.affiliation: Department of Radiology, Kantonsspital Winterthur, Winterthur, Chur, Switzerland.
authors.forename: Andreas
authors.initials: A
authors.lastname: Gutzeit
authors.affiliation: Department of Pathology, Kantonsspital Graubünden, Chur, Switzerland.
authors.forename: Michael
authors.initials: M
authors.lastname: Germer
authors.affiliation: Department of Oncology, Kantonsspital Winterthur, Winterthur, Chur, Switzerland.
authors.forename: Miklos
authors.initials: M
authors.lastname: Pless
keywords: Fluorodeoxyglucose; Gastrointestinal stromal tumors; PET/CT