Olfactory Bulb

Anterior projection of the olfactory lobe that is the place of termination of the olfactory nerves.

Olfactory Cells

Specialized cells found at the top of the nasal cavity which converts a smell detected by the olfactory hairs into tiny electrical signals.

Olfactory Nerves

Nerves which connect to the nostrils to provide one's sense of smell.

Olfactory Tract

The tract of nerve fibers in the olfactory lobe that passes from the olfactory bulb to the olfactory trigone.


A specialist in oncology


The study of cancer.


Impervious to light; not translucent or only slightly so

Optic Chiasm

Area where optic nerves cross over, located just above the pituitary gland, which can be compressed by pituitary tumors and hinder eyesight.

Optic Nerves

Nerves which connect to the eyes providing one's sense of sight.


The bony cavity containing the eyeball


The medical specialty concerned with the preservation, restoration, and development of form and function of the musculoskeletal system, extremities, spine, and associated structures by medical, surgical, and physical methods.


A condition of reduced bone mass, with decreased outer thickness and a decrease in the number and size of the spongy structures in the bone (but normal chemical composition), resulting in increased fracture incidence.

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The Pituitary Patient Resource Guide Sixth Edition is now available! Be one of the first to have the most up-to-date information. The Pituitary Patient Resource Guide a one of a kind publication intended as an invaluable source of information not only for patients but also their families, physicians, and all health care providers. It contains information on symptoms, proper testing, how to get a diagnosis, and the treatment options that are available. It also includes Pituitary Network Association's patient resource listings for expert medical care.

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Continuing Education Program

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If you are a nurse or medical professional, register for PNA CEU Membership and  earn CEU credits to learn about the symptoms, diagnosis and treatment options for patients with pituitary disorders. Help PNA reduce the time it takes for patients to get an accurate diagnosis.

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