The most common disorder affecting the optic chiasm is a pituitary adenoma.3Pituitary adenomas are benign tumors. In most cases, they have no impact at all, but in some cases, they can affect vision, sometimes causing vision loss. As they grow in size, pituitary adenomas can put pressure on … See more At the optic chiasm, nerve fibers from half of each retina cross over to the opposite side of the brain. The fibers from the other half of the retina … See more There are a number of disorders that can affect the optic chiasm. These include:2 1. Inflammatory disorders such as multiple sclerosis 2. Infections such as tuberculosis 3. Benign (noncancerous) tumors and cysts 4. … See more When a disease or lesion affects the optic nerve before it reaches the optic chiasm in the brain, the defect in the vision will show up in only one eye and … See more WebThe optic chiasm, a flattened structure, is situated about 10 mm above the pituitary gland, which rests in the sella turcica of the sphenoid bone. These structures are separated by a …
Pituitary Adenoma - EyeWiki
WebMidline meningiomas of the skull base that arise above the pituitary gland (tuberculum sellae), or in front of the pituitary gland (planum sphenoidale), typically cause progressive visual loss from optic nerve and optic chiasm … WebMay 12, 2024 · The optic chiasm is located in the front part of the brain. It lies directly in front of the hypothalamus, the part of the brain that controls body temperature, hunger and mood. Long, threadlike nerve fibers, called axons, come together from the retinas to form the optic nerves of each eye. orange corporation purchased bonds
Pituitary Gland and Pituitary Tumors - American …
WebNov 29, 2024 · Pituitary tumors are unusual growths that develop in the pituitary gland. This gland is an organ about the size of a pea. It's located behind the nose at the base of the brain. Some of these tumors cause the … WebNCI's Dictionary of Cancer Terms provides easy-to-understand definitions for words and phrases related to cancer and medicine. WebJun 7, 2024 · The pea-sized pituitary gland is composed of both anterior and posterior lobes; in adults, the vertical diameter is approximately 8mm, with the horizontal circumference found to be 12 millimeters (mm). 1 These are encased in a tough membrane (dura), and just beneath another such membrane, the sellar diaphragm, which has an … orange corte