[Metastatic breast cancer in 28 years old man]

Male breast cancer only makes up about 1% of all malignancies in the male population; the median age at time of diagnosis is 68 years. The treatment procedures used in clinical practice are those confirmed by studies on women.

Presented is a case of a 28-year-old man with breast cancer in the fourth clinical stage.

The patient was treated with the addition of trastuzumab to chemotherapy, radiotherapy, hormone treatment, with disease progression with lapatinib added to chemotherapy. 18 months after initiation of therapy, the patient died.

Despite the increase in incidence, male breast cancer remains a rare diagnosis and treatment data are not confirmed in prospective randomized studies.