Ischemic Nonmalignant Priapism as an Acute Incidental Finding on 18F-FDG PET/CT.

Kannan, Aravind K; Harrington, Samantha G; Kako, Bashar; Ng, Thomas S C; Lee, Hwan · Clin Nucl Med · 2026

case_report · Level V

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Abstract

A 23-year-old man undergoing systemic therapy for diffuse large B-cell lymphoma presented for a routine interim 18F-FDG PET/CT. PET/CT demonstrated a fully erect penis without internal FDG uptake. The patient was subsequently evaluated at the emergency department for persistent, painful erection. After successful surgical management for ischemic priapism, follow-up 18F-FDG PET/CT showed a non-erect penis with physiological uptake. An erect, internally photopenic penis is a potentially acute finding on 18F-FDG PET that may represent ischemic priapism.

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