title: Hypermetabolism of skeletal muscles following sexual activity: a normal variation.
abstract: A 46-year-old man with early gastric cancer at the gastric antrum underwent an F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET)-computer tomography (CT) scan for staging. No definite abnormal FDG uptake of the stomach was shown. Incidentally, variable FDG uptake at the bilateral serratus muscles, abdominal muscles and muscles of both thighs (Fig. 1) was observed. He had no significant past medical history except recently diagnosed stomach cancer. On personal interview, he described having had sexual activity the night before the F-18 FDG PET/CT scan, although he was aware of needing to avoid physical activity before a PET scan. The F-18 FDG PET/CT scan was done at 2:00 p.m. Therefore, the hypermetabolism of individual skeletal muscles following sexual activity lasted over 12 h. This case illustrates the hypermetabolism of skeletal muscles following sexual activity as a normal variation.
authors.affiliation: Department of Nuclear Medicine, Keimyung University, School of Medicine, No. 194 Dongsan-Dong, Jung-Gu Daegu, Korea.
authors.forename: Byung Wook
authors.initials: BW
authors.lastname: Choi
authors.affiliation: Department of Nuclear Medicine, Keimyung University, School of Medicine, No. 194 Dongsan-Dong, Jung-Gu Daegu, Korea.
authors.forename: Sung Hoon
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Nuclear Medicine, Keimyung University, School of Medicine, No. 194 Dongsan-Dong, Jung-Gu Daegu, Korea.
authors.forename: Hae Won
authors.initials: HW
authors.lastname: Kim
authors.affiliation: Department of Nuclear Medicine, Keimyung University, School of Medicine, No. 194 Dongsan-Dong, Jung-Gu Daegu, Korea.
authors.forename: Kyoung Sook
authors.initials: KS
authors.lastname: Won
authors.affiliation: Department of Nuclear Medicine, Keimyung University, School of Medicine, No. 194 Dongsan-Dong, Jung-Gu Daegu, Korea.
authors.forename: Seok Kil
authors.initials: SK
authors.lastname: Zeon
keywords: Fluorodeoxyglucose (FDG); Physiological FDG uptake; Positron emission tomography/computed tomography (PET/CT); Sexual activity; Skeletal muscle