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Male breast cancer

An educational overview summarizing the definition, symptoms, risk factors, diagnosis, and treatment of male breast cancer, aligned with the scope of evidence.

male breast carcinoma · Male breast cancer · Male breast carcinoma · breast cancer in men · breast cancer, male · carcinoma of Male breast · carcinoma of male breast · carcinoma of the Male breast · male breast cancer · male breast carcinoma

MONDO:0005628Public QA completeSource-bound · 4

Disease at a glance

Start with the essentials, then explore the patient and research views.

Public revision · 3bc715c937ae

Disease category
Male breast cancer is a cancer that occurs in the breast tissue of men. Although it is rarer than in women, it is a disease that can occur in men.
Key mechanism
Known risk factors include radiation exposure, family history of breast cancer, and high estrogen levels, which may be associated with conditions such as liver cirrhosis or Klinefelter syndrome.
Main causes · related factors
Breast cancer forms tumors due to the disruption of cell proliferation and survival regulation caused by genetic changes in breast cells, and some may spread to surrounding tissues or other organs.
Representative patterns
Representative symptoms include the appearance of a breast lump, accompanied by skin dimpling or puckering, red and scaly nipples/skin, and nipple discharge.
Individual differences
It mostly occurs in men aged 60–70, and the risk level may vary depending on radiation exposure, family history, hormonal environment, and an individual's underlying diseases.
Diagnosis
Most breast lumps in men are not cancerous, but since lumps are commonly observed in male breast cancer patients, symptoms that persist or change require evaluation.
Management
Diagnosis proceeds on the basis of medical history and physical examination, with imaging tests and, if necessary, biopsy performed; after confirmation, it involves evaluating stage and tumor characteristics within a broad framework.
Treatment/Research Status
Cancer cannot be confirmed by a breast lump alone; imaging findings, biopsy results, and receptor and stage results must be interpreted together.
Read Evidence
Management is centered on surgery, with radiotherapy, chemotherapy, hormone therapy, etc., reviewed according to the stage and tumor characteristics.
Key Precautions
The MedlinePlus overview commonly mentions mastectomy as a treatment for male breast cancer and presents radiotherapy, chemotherapy, and hormone therapy as possible treatments.

For patients and families

A structured guide for understanding the disease and preparing for clinical conversations.

At a Glance

Male breast cancer is a cancer that occurs in the breast tissue of men. Although it is rarer than in women, it is a disease that can occur in men.

Representative symptoms include the appearance of a breast lump, accompanied by skin dimpling or puckering, red and scaly nipples/skin, and nipple discharge.

How the disease works

Known risk factors include radiation exposure, family history of breast cancer, and high estrogen levels, which may be associated with conditions such as liver cirrhosis or Klinefelter syndrome.

Breast cancer forms tumors due to the disruption of cell proliferation and survival regulation caused by genetic changes in breast cells, and some may spread to surrounding tissues or other organs.

Variations in presentation among individuals

It mostly occurs in men aged 60–70, and the risk level may vary depending on radiation exposure, family history, hormonal environment, and an individual's underlying diseases.

The broad framework of diagnosis and management

Most breast lumps in men are not cancerous, but since lumps are commonly observed in male breast cancer patients, symptoms that persist or change require evaluation.

Diagnosis proceeds on the basis of medical history and physical examination, with imaging tests and, if necessary, biopsy performed; after confirmation, it involves evaluating stage and tumor characteristics within a broad framework.

Current status of treatment

Cancer cannot be confirmed by a breast lump alone; imaging findings, biopsy results, and receptor and stage results must be interpreted together.

Management is centered on surgery, with radiotherapy, chemotherapy, hormone therapy, etc., reviewed according to the stage and tumor characteristics.

The MedlinePlus overview commonly mentions mastectomy as a treatment for male breast cancer and presents radiotherapy, chemotherapy, and hormone therapy as possible treatments.

How to read clinical trials

The clinical trial registration status and whether results are disclosed must be distinguished and checked; as this record has no results, it does not support efficacy, safety, or standard treatment status.

Points to verify during clinical consultations

In clinical practice, one can identify the onset and changes in symptoms, family history and radiation exposure, relevant underlying diseases/medications, test results, treatment goals, and follow-up plans.

Medical Guidance

This material is for educational purposes and is not intended as guidance for individual diagnosis or treatment.

Evidence and sources

A trial registry status does not establish efficacy or regulatory approval.