18F-FDG PET/CT Imaging of a Rare Rectal Extraluminal Metastasis From Pulmonary Sarcomatoid Carcinoma.

Xu, Qiyun; Wu, Huiqin; Zhong, Juan; He, Yong; Li, Chongjiao · Clin Nucl Med · 2026

case_report · Level V

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Abstract

Pulmonary sarcomatoid carcinoma (PSC) is a rare and highly aggressive form of non-small cell lung cancer. Rectal metastasis of PSC is an extremely rare condition. We herein report a rare case of PSC accompanied by rectal metastasis detected by 18F-FDG PET/CT. This case highlights the diagnostic value of 18F-FDG PET/CT in detecting uncommon metastatic sites in PSC.