Atypical gynecomastia mimicking breast malignancy on mammography, sonography, and 18F‐fluciclovine PET/CT in the setting of biochemical recurrence of prostate cancer

A 60‐year‐old man with metastatic prostate cancer presented with breast swelling for one year. Suspicious breast masses were identified in both breasts with mammography and ultrasound. Biopsy of both masses showed florid gynecomastia without malignancy. Sixteen months later, the patient underwent 18...

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