What are the causes of gynecomastia (enlargement of breast tissue in males) and anemia (low red blood cell count) in men?

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From the Guidelines

Gynecomastia and anemia in men can have multiple causes, and identifying the underlying cause is crucial for proper diagnosis and treatment, with potential causes including hormonal imbalances, liver disease, kidney failure, and nutritional deficiencies 1.

Causes of Gynecomastia

Gynecomastia commonly results from hormonal imbalances, particularly elevated estrogen relative to testosterone, which can occur due to:

  • Medications like spironolactone, ketoconazole, certain antipsychotics, and some HIV medications
  • Liver disease
  • Kidney failure
  • Hyperthyroidism
  • Testicular tumors
  • Aging

Causes of Anemia

Anemia in men typically develops from:

  • Blood loss (often gastrointestinal bleeding)
  • Nutritional deficiencies (iron, vitamin B12, folate)
  • Chronic diseases (kidney disease, cancer, rheumatoid arthritis)
  • Bone marrow problems
  • Hemolysis (destruction of red blood cells)

Common Underlying Causes

When both conditions occur together, potential underlying causes include:

  • Liver cirrhosis
  • Kidney disease
  • Hormonal disorders like hypogonadism
  • Certain medications that can cause both conditions simultaneously

Diagnosis and Treatment

Treatment depends on identifying and addressing the underlying cause, which may require:

  • Laboratory testing including complete blood count, hormone levels, liver and kidney function tests
  • Possibly imaging studies
  • Consulting a healthcare provider is essential for proper diagnosis and treatment of these conditions, as seen in studies 1.

From the Research

Causes of Gynecomastia

  • Gynecomastia is a benign proliferation of glandular tissue of the breast in men, and it can be caused by an imbalance of hormones, particularly an increase in estrogen and a decrease in testosterone 2, 3, 4, 5.
  • The condition can be physiologic, meaning it occurs during normal development, such as in newborns, adolescents, and older men, or non-physiologic, meaning it is caused by an underlying condition or medication 4.
  • Medications, such as spironolactone, and certain medical conditions, such as hypogonadism, liver disease, and renal failure, can also cause gynecomastia 3, 4, 5.
  • In some cases, gynecomastia can be a symptom of an underlying tumor, such as a testicular tumor or a tumor that produces human chorionic gonadotropin (hCG) 5.

Causes of Anemia in Men

  • There is no direct evidence in the provided studies that links gynecomastia to anemia in men.
  • However, some underlying conditions that can cause gynecomastia, such as liver disease or renal failure, can also cause anemia 5.
  • Further research would be needed to determine if there is a direct link between gynecomastia and anemia in men.

Diagnosis and Treatment

  • A thorough medical history, physical examination, and laboratory tests, including hormone level tests, can help diagnose the underlying cause of gynecomastia 2, 6.
  • Treatment for gynecomastia depends on the underlying cause and can include discontinuing medications that may be causing the condition, treating underlying medical conditions, and surgical removal of excess breast tissue 2, 3, 4, 5.
  • In some cases, medical treatment, such as anti-estrogens or androgens, may be necessary to reduce the effective estrogen/androgen ratio and alleviate symptoms 3, 5.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

Gynaecomastia--pathophysiology, diagnosis and treatment.

Nature reviews. Endocrinology, 2014

Research

Gynecomastia.

American family physician, 2012

Research

Gynecomastia.

Endocrinology and metabolism clinics of North America, 1994

Research

Gynaecomastia in 786 adult men: clinical and biochemical findings.

European journal of endocrinology, 2017

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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