title: Noninvasive grading of musculoskeletal tumors using PET.
abstract: Twenty-five patients with mass lesions involving the musculoskeletal system were studied with positron emission tomography (PET) in order to determine if a relationship exists between histologic grade and tumor uptake of [fluorine-18]2-deoxy-2-fluoro-D-glucose (FDG). There were 6 benign lesions and 19 malignant lesions of various grades. A high correlation (Rho = 0.83) was found between the normalized uptake of tracer and the NCl grade. The high-grade malignancies had significantly greater (p = 0.0091) uptake of FDG than the combination of benign lesions and low-grade malignancies. All lesions with a normalized uptake value of 1.6 or greater were high-grade, while all lesions less than 1.6 represented either benign tumors or low grade malignancies. This strong relationship between FDG uptake and grade among neoplasms from a wide variety of cell types within a single organ system suggests that the technique may be useful in predicting grade even when the cell type is unknown.
authors.affiliation: Department of Radiology, Case Western Reserve University, Cleveland, Ohio.
authors.forename: L P
authors.initials: LP
authors.lastname: Adler
authors.forename: H F
authors.initials: HF
authors.lastname: Blair
authors.forename: J T
authors.initials: JT
authors.lastname: Makley
authors.forename: R P
authors.initials: RP
authors.lastname: Williams
authors.forename: M J
authors.initials: MJ
authors.lastname: Joyce
authors.forename: G
authors.initials: G
authors.lastname: Leisure
authors.forename: N
authors.initials: N
authors.lastname: al-Kaisi
authors.forename: F
authors.initials: F
authors.lastname: Miraldi
mesh_terms: D001859:Bone Neoplasms / Q000000981:diagnostic imaging*; D003847:Deoxyglucose / Q000031:analogs & derivatives; D005260:Female; D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D008875:Middle Aged; D009135:Muscular Diseases / Q000000981:diagnostic imaging*; D012983:Soft Tissue Neoplasms / Q000000981:diagnostic imaging*; D014055:Tomography, Emission-Computed
chemical_list: D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18; D003847:Deoxyglucose