Final answer:
Gynecomastia is the abnormal growth of breast tissue in males, often due to hormonal imbalances.
Step-by-step explanation:
The pathologic enlargement of the male breast is known as gynecomastia. This condition involves the development of the mammary tissue which may be linked to hormonal imbalances, such as the increased production of estrogen or a decrease in androgens (male hormones).
In contrast to hypertrophy which refers to the increase in the size of cells, hyperplasia the increase in the number of cells, and mastitis which is inflammation of the breast, gynecomastia specifically denotes the abnormal growth of breast tissue in males.