21. However, 75 % of pubertal gynecomastia cases resolve within two years of onset without treatment. 22. Conditions that can cause malabsorption such as cystic fibrosis or ulcerative colitis may also produce gynecomastia . 23. Adolescent gynecomastia is caused by the faster rise in estradiol than testosterone seen during early puberty. 24. Some boys may develop gynecomastia due to an imbalance of sex hormones, tissue responsiveness or obesity. 25. Gynecomastia can also occur once normal nutrition is restarted ( this is known as refeeding gynecomastia ).26. Gynecomastia can also occur once normal nutrition is restarted ( this is known as refeeding gynecomastia ). 27. A review of the medications or illegal substances an individual takes may reveal the cause of gynecomastia . 28. "' Quadrosilan "'( feminization and gynecomastia as side effects in male patients. 29. Gynecomastia , sexual dysfunction, and depression, are some possible side effects of 5?-reductase inhibition.30. Pubertal undervirilization is common, including gynecomastia , decreased M�llerian remnants are rare, but have been reported. 