68Ga-Prostate-Specific Membrane Antigen-Avid Malignant Pleural Effusion in a Patient With Metastatic Adenoid Cystic Carcinoma and Concordance With 18F-FDG PET/CT.

Adenoid cystic carcinoma (ACC) is a rare cancer that arises from salivary glands and other secretory glands. Pulmonary metastases are frequently observed in ACC patients with metastatic disease. Previous research showed that ACC often shows high PSMA uptake on 68Ga-PSMA-11 PET/CT. Here, we present PET images from an ACC patient with pulmonal, pleural metastases, and malignant pleural effusion, with comparable tracer uptake on 68Ga-PSMA-11 PET and 18F-FDG PET.