Gynecomastia

A usually harmless female-like enlargement of one or both breasts in males; occurs commonly in teen-aged boys, but may be a characteristic of some hypogonadal males. Excessive development of the male mammary glands, even to the functional state; the development of...

HCG

Human Chorionic Gonadotrophin; a hormone which behaves like LH; made by the placenta, hCG may be extracted and used together with hMG to treat hypogonadism. This is what is measured in a pregnancy test.

HDL

High-density lipoproteins. High density lipoproteins (HDL): the “good” cholesterol. HDL carry cholesterol in the blood from other parts of the body back to the liver, which leads to its removal from the body. So HDL help keep cholesterol from building up...

Hemianopsia

Loss of one half of the field of vision (the area that can be seen by each eye when staring straight ahead). Can occur in isolation or affecting both eyes. The most common form of vision loss due to pituitary tumors is loss of the outer half of vision in both...