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Topic: Pituitary


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In the News (Sat 17 Aug 19)

  
  Pituitary Network Association - FAQ
The pituitary is a small, pea-sized gland located at the base of the brain that functions as "The Master Gland." From its lofty position above the rest of the body it sends signals to the thyroid gland, adrenal glands, ovaries and testes, directing them to produce thyroid hormone, cortisol, estrogen, testosterone, and many more.
Pituitary disorders can cause a wide spectrum of symptoms, both hormonal and neurological, due to its location near the brain, the intracranial nerves and blood vessels and because of the vital hormonal control that the gland provides.
Pituitary tumors can either be nonfunctional (that is they do not secrete hormones) or produce specific hormones, such as prolactin (causing infertility, decreased libido, and osteoporosis), growth hormone (causing acromegaly), ACTH (causing Cushing's), TSH (causing hypothyroidism), or be nonfunctional (that is they do not produce hormones).
www.pituitary.org /faq   (2482 words)

  
  Pituitary Tumors
The pituitary gland is a kidney bean shaped structure attached to the base of the brain (behind the nose), where it is protected by a small part of the skull called the sphenoid bone.
The pituitary gland is made up of two different regions, the "anterior pituitary" -- the part of the gland closest to the front of the head -- and the "posterior pituitary" -- the part of the gland closest to the back of the head.
Pituitary adenomas are benign tumors (meaning that they are non-cancerous and do not travel to other parts of the body) that arise exclusively within the anterior pituitary.
healthlink.mcw.edu /article/956627185.html   (2519 words)

  
 Pituitary Q&A
A very uncommon type of pituitary tumor is inherited, this is called Multiple Endocrine Neoplasia, Type I. In this situation, there is usually a family history of endocrine tumors, most commonly a parathyroid tumor, a pituitary tumor and less commonly, a tumor of the pancreas.
Since the pituitary gland is located at the base of the brain and is connected to the brain by a thin stalk, there is often confusion, particularly by insurance companies, about the classification of a pituitary tumor.
Since not all pituitary tumors produce an excessive amount of a hormone or hormones, the only measure of successful medical therapy for a non hormone-producing tumor is the effect on tumor size and clinical symptoms (visual problems, headache).
www.healthsystem.virginia.edu /internet/neurosurgery/pituitaryqa.cfm   (9287 words)

  
 MedlinePlus: Pituitary Disorders
The primary NIH organization for research on Pituitary Disorders is the National Institute of Neurological Disorders and Stroke
Your pituitary gland is a pea-sized gland at the base of your brain.
The pituitary is the "master control gland" - it makes hormones that affect growth and the functions of other glands in the body.
www.nlm.nih.gov /medlineplus/pituitarydisorders.html   (395 words)

  
 Prolactinoma - What is a prolactinoma? - Neuroendocrine Clinical Center & Pituitary Tumor Center at MGH/Harvard
Prolactin secretion in the pituitary is normally suppressed by the brain chemical, dopamine.Drugs that block the effects of dopamine at the pituitary or deplete dopamine stores in the brain may cause the pituitary to secrete prolactin.
Because the results of surgery are so dependent on the skill and knowledge of the neurosurgeon, a patient should ask the surgeon about the number of operations he or she has performed to remove pituitary tumors, and for success and complication rates in comparison to major medical centers.
In women with large tumors, the risk of damage to the pituitary or eye nerves is greater, and some doctors consider it as high as 25 percent.
pituitary.mgh.harvard.edu /prolacti.Htm   (1905 words)

  
 Pituitary Network Association
Pituitary Tumors, the consensus was reached that at least 16.7% of the population develop or harbor pituitary tumors.
At the current time, society, patients and the medical community are seemingly focusing all of their efforts and attention to the treatment of pituitary tumors and their eradication or diminution.
Pituitary tumors exhibit a spectrum of biology, with variable growth and hormonal behaviors.
www.pituitary.com   (2414 words)

  
 Pituitary Adenoma and pituitary tumors treatment at Mayo Clinic
Almost all pituitary tumors are adenomas which do not spread outside the skull and usually remain confined to the pituitary, or in tissues near the pituitary.
Treatments for pituitary tumors depend on the tumor's type, size, how far the tumor has spread into the brain, and the patient's age and overall health.
Although the growth and spread of pituitary tumors is not extensive, they can have a big impact on a patient's health.
www.mayoclinic.org /pituitary-tumors   (322 words)

  
 Pituitary Disorders
Anterior pituitary hormones are regulated by hypothalamic releasing and inhibitory hormones and the negative feedback action of the target glandular hormones at both pituitary and hypothalamic levels (Table 1).
Pituitary adenomas are rarely associated with parathyroid and pancreatic hyperplasia or neoplasia as part of the multiple endocrine neoplasia type I syndrome.
Pituitary MRI is the preferred diagnostic imaging technique in patients with visual loss or hypopituitarism suggestive of a pituitary tumor (Figure 2).
www.clevelandclinicmeded.com /diseasemanagement/endocrinology/pituitary/pituitary.htm   (4701 words)

  
  NeurosurgeryToday.org | What is Neurosurgery | Patient Education Materials | pituitary tumors
The pituitary is a small gland attached to the base of the brain (behind the nose) in an area called the pituitary fossa or sella turcica.
The pituitary gland has two distinct parts: the anterior pituitary is closest to the front of the head, while the posterior pituitary is closest to the back of the head.
The anterior pituitary is formed from the same tissue as the pharynx (the upper part of the mouth).
www.neurosurgerytoday.org /what/patient_e/pituitary.asp   (1615 words)

  
 Cancer Information, Research, and Treatment for all Types of Cancer | OncoLink
Pituitary adenomas are benign growths of glandular tissue that almost always grow from the anterior lobe of the pituitary gland.
Pituitary adenomas can be either non-secreting adenomas, meaning that they do not produce excess levels of hormones, or they can be secreting adenomas, meaning that they produce an excessive level of one or more of the hormones normally produced by the pituitary gland.
Most pituitary adenomas are discovered because they produce symptoms, either from direct pressure due to their large size (in the case of macroadenomas), or due to the hormones that they secrete.
www.oncolink.org /types/article.cfm?c=4&s=9&ss=819&id=9538   (3712 words)

  
 ACS :: What Are Pituitary Tumors?
There is no reliable way to distinguish pituitary carcinomas from large pituitary adenomas, except when a pituitary tumor spreads to another part of the body -- usually to the brain, spinal cord, meninges (covering layer of the brain and spinal cord), or bone and less often, to the liver, ovaries, heart or lungs.
In the past, pituitary tumors were classified by their appearance under the microscope after they were removed by surgery.
Craniopharyngiomas are not pituitary tumors in the true sense, but they can develop next to the pituitary or in other areas within the skull.
www.cancer.org /docroot/CRI/content/CRI_2_4_1x_What_Are_Pituitary_Tumors_61.asp?rnav=cri   (1397 words)

  
 Frequently Asked Questions About Transsphenoidal Surgery For Pituitary Adenomas - Neuroendocrine Clinical Center & ...
Pituitary adenomas are benign tumors which arise from the pituitary gland itself.
Pituitary tumors can be either secretory or non-secretory, referring to whether they overproduce pituitary hormones.
A spinal fluid leak sometimes occurs because pituitary tumors are separated from the spinal fluid which bathes the brain by a very thin membrane.
pituitary.mgh.harvard.edu /TranssphenoidalSurgery.htm   (2044 words)

  
 Pituitary Tumors
Pituitary tumors are abnormal growths on the pituitary gland.
Pituitary tumors that grow from gland tissue (adenomas) and tumors that occur in children and adolescents (craniopharyngiomas) are the most common types.
Although pituitary tumors usually develop between the ages of 30 and 40, half of all pituitary tumors occur in children, with symptoms usually appearing between the ages of five and ten.
www.hmc.psu.edu /healthinfo/pq/pituitarytumor.htm   (590 words)

  
 Pituitary Gland
The pituitary gland is sometimes called the "master" gland of the endocrine system, because it controls the functions of the other endocrine glands.
The pituitary gland is no larger than a pea, and is located at the base of the brain.
The gland is attached to the hypothalumus (a part of the brain that affects the pituitary gland) by nerve fibers.
www.umm.edu /endocrin/pitgland.htm   (207 words)

  
 Pituitary tumors
However, because the pituitary gland is very important in helping to regulate the hormones of the body, even a small disruption can have serious effects on mood, on the ability to focus and concentrate, as well as on growth and overall maturation.
Pituitary tumors that limit the secretion of TSH can also affect a child in many ways, including making it harder to concentrate, tiredness, constipation, dry skin, and a sensitivity to cold.
The most common type of pituitary tumor in children is due to growth of embryonic remnants in the area of the pituitary gland and is called craniopharyngioma.
www.hmc.psu.edu /pediatricneurosurgery/services/pituitary.htm   (1109 words)

  
 Cushing's Syndrome   (Site not responding. Last check: )
Conversely, pituitary tumors are not detected by imaging in almost 50 percent of patients who ultimately require pituitary surgery for Cushing's syndrome.
Radiation to the pituitary gland is given over a 6-week period, with improvement occurring in 40 to 50 percent of adults and up to 80 percent of children.
Identification of the corticotropin releasing hormone (CRH), which instructs the pituitary gland to release ACTH, enabled researchers to develop the CRH stimulation test, which is increasingly being used to identify the cause of Cushing's syndrome.
www.niddk.nih.gov /health/endo/pubs/cushings/cushings.htm   (2803 words)

  
 CPMC Neurosurgery - Pituitary Tumors
The pituitary body is an endocrine gland located in a depression in the base of the skull called the sella turcica.
The pituitary itself may be compromised by the intrinsic mass and cause deficiencies of pituitary hormones.
In the case of large pituitary tumors which cannot be safely removed through the transphenoidal approach, a craniotomy made on the front or side of the skull allows direct access to the area of the pituitary from an intracranial approach utilizing slight elevation of the brain and then microsurgical resection.
cpmcnet.columbia.edu /dept/nsg/NSGCPMC/specialties/pituitary.html   (1128 words)

  
 Pituitary tumors
The pituitary gland is part of your endocrine system, which consists of glands that produce hormones that regulate processes throughout your body.
Pituitary tumors are almost always noncancerous (benign), which means they don't spread to other parts of your body, but they can increase in size.
Pituitary tumors often can be treated effectively to return your hormone levels to normal and alleviate your signs and symptoms.
www.cnn.com /HEALTH/library/DS/00533.html   (1874 words)

  
 Functional Anatomy of the Hypothalamus and Pituitary Gland
The pituitary gland, also known as the hypophysis, is a roundish organ that lies immediately beneath the hypothalamus, resting in a depression of the base of the skull called the sella turcica ("Turkish saddle").
In an adult human or sheep, the pituitary is roughly the size and shape of a garbonzo bean.
It is composed largely of the axons of hypothalamic neurons which extend downward as a large bundle behind the anterior pituitary.
arbl.cvmbs.colostate.edu /hbooks/pathphys/endocrine/hypopit/anatomy.html   (507 words)

  
 eMedicine - Pituitary Tumors : Article by Jorge Kattah, MD
Pituitary tumors are common neoplasms, and recognition of their presentation is critical since a favorable therapeutic outcome is dependent on early identification of the lesion.
The endocrinologic morbidity that is associated with pituitary tumors is dependent on the specific underproduction or overproduction of a hormone or hormones associated with the tumor.
Pituitary irradiation is required in the remaining cases to prevent the development of Nelson syndrome.
www.emedicine.com /neuro/topic312.htm   (5771 words)

  
 Pituitary Tumors Information Page: National Institute of Neurological Disorders and Stroke (NINDS)
Pituitary tumors are abnormal growths found in the pituitary gland, a small organ--about the size of a dime and located in the center of the brain--which makes hormones that affect growth and the functions of other glands in the body.
Symptoms of pituitary tumors may include headaches, vision problems, nausea and vomiting, or any of the problems caused by the production of too many hormones such as infertility or loss of menstrual periods in women, abnormal growth, high blood pressure, heat or cold intolerance, and other skin and body changes.
Although prognosis depends on the type of pituitary tumor and the patient's age and general state of health, pituitary tumors are usually curable.
www.ninds.nih.gov /disorders/pituitary_tumors/pituitary_tumors.htm   (469 words)

  
 pituitary
Pituitary adenomas are biologicallly benign tumors originating from adenohypophyseal cells capable of producing various pituitary hormones.
Recent MR evaluation in the general population shows that about 10% of the normal adult population has pituitary abnormalities that are compatible with the diagnosis of asymptomatic pituitary adenomas.
Pituitary tumors develop in transgenic mice carrying the growth inducer SV-40 T antigen, suggesting that an intrinsic genetic defect leads to clonal expansion of a transformed pituitary cell.
www.thamburaj.com /pituitary.htm   (4001 words)

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