To Majestic 
Pituitary tumor support group site. Patients communicate via a message board and guestbook.
http://members.aol.com/tomajesticPituitary Network Association 
Non-profit organization for patients with pituitary tumors and disorders, their families, and health care providers who treat them.
http://www.pituitary.org/
MedlinePlus: Pituitary Disorders 
Contains an overview, symptoms, treatment, coping, genetics, and clinical trials.
http://www.nlm.nih.gov/medlineplus/pituitarydisorders.html
Neuroendocrine & Pituitary Information Links 
Resources for patients. From Massachusetts General Hospital's Neuroendocrine Clinical Center.
http://pituitary.mgh.harvard.edu/LnksPit.htm
Pituitary Disorders Education & Support 
Their goal is to improve health care through communication, public awareness, and patient education. Lists treatments and conditions, newsletters, and patient stories.
http://pituitarydisorder.net/
Pituitary Chat 
On-line message board with links to information about all aspects of pituitary problems.
http://groups.msn.com/PituitaryChat
American Cancer Society: Do We Know What Causes Pituitary Tumors? 
Article that explains the cause of tumors, how they develop, risk factors, and prevention.
http://www.cancer.org/docroot/cri/content/cri_2_4_2x_do_we_know_what_causes_pituitary_tumors_61.asp?sitearea=cri
OHSU Pituitary Unit 
Comprehensive treatment center specializing in pituitary tumors and diseases including cushing's, acromegaly, and prolactinomas.
http://www.ohsupituitary.com/
NINDS Pituitary Tumors Information Page 
Information sheet compiled by the U.S. National Institute of Neurological Disorders and Stroke which discusses definitions, prognosis, treatment and research issues.
http://www.ninds.nih.gov/disorders/pituitary_tumors/pituitary_tumors.htm
UCLA Pituitary Tumor and Neuroendocrine Program 
UCLA's program page provides information regarding the clinic, its procedures, research, patient services, links, and a support group.
http://www.pituitary.ucla.edu/index.html
The Hormone Foundation: Pituitary Disorders 
Provides an overview on secretory and non-secretory tumors, treatment options, lifestyle issues, and prevention; as well as other pituitary-related resources.
http://www.hormone.org/public/pituitary.cfm
Pit Pat - The Pituitary Foundation 
Provides information and support to those suffering from pituitary disorders, their relatives, friends and carers. Includes newsletters, resources, GP fact file, general information for patients and a glossary.
http://www.pituitary.org.uk/
California Center for Pituitary Disorders at UCSF 
A multi-disciplinary center designed to provide comprehensive care to all patients with newly diagnosed and pre-existing pituitary disorders. Providing information on pathology, diagnosis, and treatment options.
http://ccpd.ucsf.edu