Soft tissue sarcomas (STS) are highly fluorine-18-fluorodeoxyglucose (18F-FDG)-avid tumours. PET seems to be effective for the assessment of the extent of disease. However, the use of PET to stratify STS into different risk histotypes still remains controversial. Our aim was to evaluate 18F-FDG uptake in different STS types and to assess the prognostic value of the maximum standardized uptake value (SUVmax).
We reviewed 50 adult patients with primary high-grade STS of the extremities with a preoperative PET. Overall survival and local recurrence were analysed.
The mean SUVmax was 12.9 (range: 2.2–33.4). All cases of myxoid liposarcoma and all cases of synovial sarcoma had SUVmax of less than 10.3. A better overall survival and local recurrence were observed in patients with SUVmax of less than 10.3 (P=0.005 and 0.046, respectively).
SUVmax seems to be specific among different STS histotypes. PET does not seem to be useful in myxoid liposarcoma as well as synovial sarcoma as these tumours seem to have a low uptake of glucose. SUVmax might also be included as a prognostic factor.
aIRCCS Rizzoli Orthopaedic Institute
bNuclear Medicine Unit, Sant’ Orsola-Malpighi Hospital
cDepartment of DIBINEM University of Bologna, Bologna, Italy
Correspondence to Andrea Sambri, MD, Istituto Ortopedico Rizzoli, Via Pupilli 1, 40136 Bologna, Italy Tel/fax: +39 516 366 523; e-mail: email@example.com
Received December 5, 2018
Received in revised form January 26, 2019
Accepted February 6, 2019