Sessile Serrated Adenoma Plus Lipoid Pneumonia Mimicking a Colon Cancer With Pulmonary Metastatic Lesions on 18 F-FDG PET/CT.

Duarte, Paulo Schiavom; Moraes, Rafael Dyer Rodrigues de; Costa, Euclides Antônio da; Sapienza, Marcelo Tatit; Buchpiguel, Carlos Alberto · Clin Nucl Med · 2025

case_report · Level V

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Abstract

A 65-year-old man with a history of chronic cough presented with bilateral pulmonary masses identified on computed tomography. A 18 F-FDG PET/CT study demonstrated moderate uptake in the lung masses and unexpectedly intense uptake in a proximal transverse colonic lesion. While the initial interpretation suggested metastatic lung disease from colon cancer, subsequent colonoscopic resection of the colon lesion and biopsy of the lung lesions revealed a sessile serrated adenoma and lipoid pneumonia, respectively. The patient disclosed a history of mineral oil use for constipation.

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