What type of doctor should I see

My GYN thinks I have hypothalamic pituitary failure after a workup to determine why I stopped have periods. I believe I may have some thyroid involvement as well.

What type of doctor should I see to work up this problem? These glands are so important in maintaing 100's of normal bodily functions and they all work intimately together to create a find balance of chemicals and hormones. I would like to find a doctor that truly understands the complexity. I don't think my PCP or GYN are cut out for the task.

I would advise you to see an Endocrinologist.

The area of Endocrinology that you should be concerned with would be hormonal. An endocrinologist deals with disorders of the endocrine system, and these disorders usually have a great deal to do with hormones. I haven't looked at my endocrine system information (notes) in a long time, but I feel like I can answer your question properly.

Hypopituitarism can cover several different disorders, and a problem with the hypothalamus could also exaggerate a pituitary problem. The hypothalamus controls both parts of the pituitary gland, POSTERIOR PITUITARY (the PP) and the ANTERIOR PITUITARY (the AP) through the secretion of "releasing hormones". Diabetes Insipidus refers to a deficiency in the hormones coming from the PP. The term hypopituitarism usually refers to a deficiency in one (or more) of the hormones secreted by the AP. The AP secretes 6 different hormones, such as TSH (Thyroid Stimulating Hormone). Another two hormones are secreted, and I will mention these other two because of their relevance here in your situation, are LH (Lutenizing hormone, which effects the menstrual cycle) and FSH (Follicle Stimulating Hormone, which does a similar task like LH)