Endocrine surgery refers to operations on one or more glands of the endocrine system. There are a number of other endocrine glands and different surgeons specialise in each and every one. Endocrine surgeons work closely with their medical colleagues, endocrinologists, the doctors responsible for both initial diagnoses and investigations of a patient’s endocrine disorder such as diabetes.Endocrine glands can secrete particular hormones in either an excess or at a deficit. Depending on which, the condition is then labeled as "hyper" or "hypo" respectively. Endocrinology also concerns itself with the issues concerning obesity, hair growth or thinning and osteoporosis.