Male ductal carcinoma in situ: diagnosis and management of a rare disease in men

Ductal carcinoma in situ is very rare in male patients, accounting for approximately 5%–7% of all male breast cancers. We present a case of a man in his early 70s who presented with bloody nipple discharge and gynaecomastia and was subsequently diagnosed with ductal carcinoma in situ (DCIS). We discuss his management with surgical resection and the consideration of adjuvant treatment. We also review the existing literature on the presentation, diagnosis and management of DCIS in men.