Gynecomastia in men refers to what physical change?

Gynecomastia in men specifically refers to the enlargement of breast tissue, resulting in the development of female-type breasts. This condition is often caused by an imbalance between testosterone and estrogen levels in the body, leading to glandular tissue growth. It can occur in various situations, including hormonal changes during puberty, aging, certain medications, or health conditions.

The other options are unrelated to the condition. The development of large abdominal muscles pertains to increased muscle mass in the stomach area, which does not correlate with breast tissue changes. An increase in body hair is more aligned with hormonal shifts associated with testosterone but does not define gynecomastia itself. Weight loss around the midsection refers to fat reduction in that area and is not connected to the growth of breast tissue in males. Therefore, the most accurate representation of gynecomastia is the development of female-type breasts.