Asynchronous bilateral male breast cancer. A rare case report

We describe a rare case of asynchronous bilateral carcinoma of the mammary glands in a 66-year-old man. The patient was admitted to the Department of Dermatology and Venereology due to exacerbation of chronic eczema. During the examination, a 3×2-cm tumor with retraction of the mammilla was found in the right mammary gland. Mastectomy and regional lymphatic dissection were performed. Histological examination showed invasive ductal carcinoma, ER (+) 70%, PR (-), HER2 (-). Treatment included chemotherapy, radiotherapy, and hormone therapy. Three years later, the patient reported a lump in the left breast. The presence of a tumor formation was confirmed by mammography and ultrasound examination. A radical mastectomy with regional lymphatic dissection was performed. Histological examination showed invasive ductal carcinoma of the mammary gland, ER (3+) 80%, PP (2+) 60%, HER2 (+++), and Ki67 (+) 80%. Treatment with chemotherapy and radiation therapy was carried out. Five years after diagnosis of the second carcinoma, the patient is in a good general condition. Regardless of its rarity, the described case should draw doctors' attention to this pathology. Assessment of risk factors and periodic breast examination in men would allow early diagnosis, timely treatment, and better prognosis of the disease.