MedicineNet - Hypothyroidism:Description, causes, symptoms, and treatment. Includes information about secondary hypothyroidism which is related to an abnormality in the pituitary gland.
eMedicine - Hypothyroidism: Article by Philip R Orlander, MD. Containing background, pathophysiology, symptoms, differentials, and clinical findings.
Endocrineweb - Hypothyroidism: Thorough overview includes symptoms, dangers, diagnosis, and treatment of hypothyroidism. Written by doctors for patients.
Hypothyroidism: A physician's site covering the basics. Includes causes, risks, associated disease, symptoms, standard laboratory tests, reference ranges, Free T3 and Free T4.
Hypothyroidism (Myxedema): HealthWorld Online provides signs, symptoms, and discusses alternative therapies for low thyroid function.
Hypothyroidism Type 1 & 2: Suggests that there is more than one type of myxedema that is yet to be recognized by mainstream medicine. Provides a number of photographs.
InteliHealth - Hypothyroidism: Harvard Medical School's consumer health information. Includes symptoms, diagnosis, prevention, and treatment.
The Merck Manual - Hypothyroidism: A look at myxedema including signs, symptoms, diagnosis, laboratory evaluation, and treatment.