Nuclear Medicine and Molecular Imaging

The Korean Society of Nuclear Medicine (대한핵의학회)
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F-18 FDG Uptake in Respiratory Muscle Mimicking Metastasis in Patients with Gastric Cancer

위암 환자에서 전이로 오인된 호흡근의 F-18 FDG 섭취

  • Choi, Seung-Jin (Department of Nuclear Medicine, Inha Univiersity College of Medicine) ;
  • Kim, Jeong-Ho (Department of Radiology, Gachon Medical School Gil Medical Center) ;
  • Hyun, In-Young (Department of Nuclear Medicine, Inha Univiersity College of Medicine)
  • 최승진 (인하대학교 의과대학 핵의학교실) ;
  • 김정호 (가천의과대학교 길병원 방사선과) ;
  • 현인영 (인하대학교 의과대학 핵의학교실)
  • Published : 2006.08.31
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Abstract

A 67-year-old man with a history of chronic obstructive pulmonary disease (COPD) underwent F-18 fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) for staging of gastric cancer. The projection images of F-18 FDG PET/CT showed intensely increased F-18 FDG uptake in the anterior neck, chest wall, and upper abdomen. We suspected distant metastases of cervical lymph nodes, ribs, and peritoneum in gastric canter. However, the transaxial images of F-18 FDG PET/CT showed abnormal F-18 FDG uptake in scalene muscles of anterior neck, intercostal muscles of chest wall, and diaphragm of upper abdomen. Patients with COPD use respiratory muscles extensively on the resting condition. These excessive physiologic use of respiratory muscles causes increased F-18 FDG uptake as a result of increased glucose metabolism. The F-18 FDG uptake in respiratory muscles of gastric cancer patient with COPD mimicked distant metastases in cervical lymph nodes, ribs, and peritoneum.

Keywords

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