Gynecomastia is the enlargement of male breast tissue, and it can result from several underlying conditions that affect hormone levels or lead to abnormal tissue growth. Let's evaluate each option:
- Teratoma of testis: This is a tumor that can produce hormones, including estrogen, which can lead to gynecomastia. Therefore, teratoma of testis can be a cause of gynecomastia.
- Leprosy: Leprosy has been associated with hormonal imbalances, including changes in estrogen levels, which can lead to gynecomastia. Thus, leprosy can contribute to gynecomastia.
- Cirrhosis of liver: Cirrhosis of the liver can result in impaired metabolism of hormones, particularly estrogen, leading to gynecomastia. Therefore, cirrhosis of liver is also a known cause.
- Pulmonary tuberculosis: Pulmonary tuberculosis, however, does not directly affect the hormonal balance or cause gynecomastia. While TB may be associated with systemic illness, it is not a recognized cause of gynecomastia.
Therefore, the correct answer is Pulmonary tuberculosis.