<prompt> All are causes of Gynaecomastia, exceptCimetidine therapyAndrogen therapyLeprosySmall cell carcinoma lung  <response>: Even androgen therapy can cause gynecomastia but among all options given in the question, the best answer is androgen therapy.Some important causes of GynaecomastiaLeprosy Testicular tumours Lung cancer - Small cell type Adrenal disease Liver diseaseHyperthyroidism Hyperprolactinemia Castration Orchitis Drugs -Digitalis Spironolactone Cimetidine Clomiphene Methyldopa Androgens Gonadotrophins Estrogens Progesterones Ketoconazole. Gynecomastia refers to the enlargement of the male breastHormone effectsLike the female breast, the male breast is also subject to hormonal influences, and gynecomastia occurs as a result of an imbalance between estrogens which stimulate breast tissue and androgens which counteract these effects.Usually, gynecomastia is caused by an estrogen excess and is usually the result of an increased estrogenandrogen ratio, caused by -Increased estrogenDecreased androgenhCG producing tumours hCG stimulates Leydig cells to produce estrogen. 