2025/06/23 by Fernandes, Eduardo, Saldanha, Lourenço, Lameiras, Raquel
Medicine · #Adult male #Benign neoplasms #Breast Lesions and Carcinomas #Cancer and Skin Lesions #Hamartoma #Lesion #Male Breast Health Studies #Mammography #Mass/lesion #Ultrasound
paper · pdf · doi:10.25748/arp.42089
openalex publication_date 2025/06/23 · openalex created_date 2025/11/23 · openalex updated_date 2026/07/15
A 43-year-old man presented with a slowly growing periareolar lump. Mammography and ultrasound showed a well-defined encapsulated oval mass with intermixed fat and stroma, creating the classic “breast-within-a-breast” appearance. Male breast hamartoma is exceedingly rare—fewer than ten cases reported—but its hallmark imaging allows confident diagnosis without biopsy. The lesion was categorised BI-RADS 2, and annual clinical follow-up was recommended. This case highlights the value of recognising this benign entity and sparing unnecessary intervention.