A Case of Incidental Adenoid Cystic Carcinoma of the Trachea on Gallium-68 PSMA PET/CT Imaging.

Sabuncu, Safiya; Karyağar, Savaş; Seyhan, Ekrem Cengiz; Ünver, Nurcan · Clin Nucl Med · 2026

case_report · Level V

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Abstract

PSMA PET, widely used in prostate cancer, targets a transmembrane glycoprotein overexpressed in tumor cells, and PSMA expression is also seen in some nonprostatic tumors and normal tissues. In this case, a 66-year-old man with biopsy-proven prostate adenocarcinoma and PSA 16 ng/mL underwent 68Ga-PSMA PET/CT for staging. Focal uptake consistent with primary prostate malignancy was detected in the mid-prostate, predominantly left lateral. In addition, a polypoid intraluminal tracheal lesion demonstrated intense PSMA expression. Histopathology confirmed adenoid cystic carcinoma, emphasizing the modality's value beyond prostate cancer.