Nucl Med Mol Imaging.  2010 Sep;44(3):228-229.

Hypermetabolism of Skeletal Muscles Following Sexual Activity: A Normal Variation

• Choi BW
• Kim SH
• Kim HW
• Won KS
• Zeon SK

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.

Keyword

Positron emission tomography/computed tomography (PET/CT); Fluorodeoxyglucose (FDG); Skeletal muscle; Sexual activity; Physiological FDG uptake

MeSH Terms

Abdominal Muscles
Humans
Middle Aged
Motor Activity
Muscle, Skeletal
Muscles
Positron-Emission Tomography
Pyloric Antrum
Sexual Behavior
Stomach
Stomach Neoplasms
Thigh