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Topic: Malformation

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	Arnold-Chiari malformation - Wikipedia, the free encyclopedia
		Arnold-Chiari malformation, sometimes referred to as 'Chiari malformation' or ACM, is a congenital anomaly of the brain in which the cerebellar tonsils are elongated and pushed down through the opening of the base of the skull (see foramen magnum), blocking the flow of cerebrospinal fluid (CSF).
		The brainstem, cranial nerves, and the lower portion of the cerebellum may be stretched or compressed.
		Arnold-Chiari Malformation II occurs in almost all children born with both spina bifida and hydrocephalus, but ACM I is typically seen in children and adults without spina bifida.
	en.wikipedia.org /wiki/Arnold-Chiari_malformation (390 words)

	Child Health Library - Neurological Disorders - Chiari Malformation
		A Chiari malformation is a congenital (present at birth) defect in the area of the back of the head where the brain and spinal cord connect.
		Type II Chiari malformations are typically seen in infants who are born with spina bifida, a neurological condition that causes a portion of the spinal cord and the surrounding structures to develop outside, instead of inside, the body.
		Chiari malformation may be caused by exposure to harmful substances during fetal development or associated with genetic problems or syndromes that may have a tendency to run in families.
	www.chp.edu /greystone/neuro/chari.php (884 words)

	Cerebral arteriovenous malformation - Wikipedia, the free encyclopedia
		A cerebral arteriovenous malformation (AVM) is a congenital disorder of blood vessels within the brain, characterized by tangle(s) of veins and arteries.
		While an arteriovenous malformation can occur elsewhere in the body, this article discusses malformations found in the brain.
		The most frequently observed problems related to the mechanical and blood loss (ischemic) effects of an AVM are headache and seizure.
	en.wikipedia.org /wiki/Cerebral_arteriovenous_malformation (755 words)

	Arnold-Chiari Malformation Information on Healthline
		Malformations may occur in the lower portion of the brain (cerebellum) or in the brain stem.
		Although this malformation is present at birth, there may not be any symptoms of a problem until adulthood.
		Arnold-Chiari malformations are the most common type of malformation of the cervico-medullary junction, the area where the brain and spine connect.
	www.healthline.com /galecontent/arnold-chiari-malformation (1079 words)

	Dandy-Walker malformation Information on Healthline
		Dandy-Walker malformation is a congenital (present at birth) condition involving several abnormalities in the development of the brain.
		In Dandy-Walker malformation, the CSF produced by the ventricles of the brain is not fully reabsorbed by the body; thus, the excess fluid accumulates in the fourth ventricle and the posterior fossa.
		As of 2001, the genetic transmission of Dandy-Walker malformation is not fully understood because the disorder often occurs with other birth abnormalities including cleft palate, extra fingers (polydactyly) or fingers joined together (syndactyly), cataracts, and malformations of the face or heart.
	www.healthline.com /galecontent/dandy-walker-malformation (1190 words)

	MedlinePlus Medical Encyclopedia: Arteriovenous malformation - cerebral
		A cerebral arteriovenous malformation is a congenital disorder (present at birth) of the brain's blood vessels.
		The cause of cerebral arteriovenous malformation (AVM) is unknown.
		Open brain surgery is the actual removal of the malformation in the brain through an opening made in the skull.
	www.nlm.nih.gov /medlineplus/ency/article/000779.htm (985 words)

	Capillary Malformations, Cincinnati Children's Hospital Medical Center
		A capillary malformation (commonly referred to as a portwine stain), is a flat, sharply defined vascular stain of the skin.
		Although the number of blood vessels in a capillary malformation are normal, the diameter of the affected vessels is much larger than that in normal vessels; this enlargement results in increased blood flow.
		A capillary malformation that involves the skin on the eyelids can be associated with elevated pressure within the eye and may be indicative of a more serious condition.
	www.cincinnatichildrens.org /health/info/vascular/diagnose/capillary.htm (895 words)

	What is the Chiari Malformation?
		It is characterized by a small or misshapen posterior fossa (the compartment in the back of the skull), a reduction in cerebrospinal fluid pathways and a protrusion of the cerebellar tonsils through the bottom of the skull (foramen magnum) into the spinal canal.
		Chiari Malformations are also known as herniation of the cerebellar tonsils, cerebellar ectopia, hindbrain herniation and Arnold-Chiari malformations.
		It is recommended that patients diagnosed with a Chiari Malformation have the entire spine imaged to rule out the presence of a syrinx, since it may be a consideration in treatment and prognosis.
	www.asap.org /chiari-malformation.html (633 words)

	Treatment of Chiari Malformation at Mayo Clinic
		Chiari malformation is a rare abnormality at the base of the brain that results in brain tissue extending into the spinal canal.
		Chiari-I malformation usually causes symptoms in young adults and is often associated with syringomyelia (a tubular, fluid-filled cavity within the spinal cord) and abnormalities in the bones of the skull and/or spine.
		Chiari-II malformation is almost always associated with myelomeningocele (a type of spina bifida) and hydrocephalus (excess fluid buildup within the brain), which usually are apparent at birth.
	www.mayoclinic.org /chiari-malformation/index.html (537 words)

	"The Arnold-Chiari Malformation"
		There are several types of Arnold-Chiari malformations, but only the Type I Arnold-Chiari is seen with any frequency in chiropractic clinical practice, as the symptoms related to the type I Arnold-Chiari malformation do not typically present themselves until the patient is between the ages of 20-40.
		With this type of congenital neurological anomaly, the extra space posterior to the spinal cord in the upper cervical region is occupied by cerebellar tissue, thus crowding the upper cervical neurological structures.
		Should the presence of an Arnold-Chiari malformation be suspected in a headache patient, the patient should be referred for an MRI of the region.
	www.chiroweb.com /archives/09/23/01.html (487 words)

	Chiari Malformation
		Arnold-Chiari Malformation is a condition in which the cerebellum portion of the brain protrudes into the spinal canal.
		Arnold-Chiari I type malformation usually causes symptoms in young adults and is often associated with syringomyelia, in which a tubular cavity develops within the spinal cord.
		Arnold-Chiari II type malformation is associated with myelomeningocele (a defect of the spine) and hydrocephalus (increased cerebrospinal fluid and pressure within the brain), which usually are apparent at birth.
	www.clevelandclinic.org /health/health-info/docs/1200/1264.asp (384 words)

	NeurosurgeryToday.org \| What is Neurosurgery \| Patient Education Materials \| chiari malformation
		This malformation occurs during fetal development and is characterized by downward displacement by more than four millimeters, of the cerebellar tonsils beneath the foramen magnum into the cervical spinal canal.
		This malformation is characterized by downward displacement of the medulla, fourth ventricle, and cerebellum into the cervical spinal canal, as well as elongation of the pons and fourth ventricle.
		Chiari I malformations may be treated surgically with only local decompression of the overlying bones, decompression of the bones and release of the dura (a thick membrane covering the brain and spinal cord), or decompression of the bone and dura and some degree of cerebellar tissue resection.
	www.neurosurgerytoday.org /what/patient_e/chiari1.asp (2084 words)

	eMedicine - Chiari II Malformation : Article by Lutfi Incesu, MD
		Pathophysiology: The Chiari II malformation is a complex anomaly with skull, dural, brain, spinal, and spinal cord manifestations.
		Symptomatic Chiari II malformation is the leading cause of mortality in the myelodysplastic population.
		An encysted fourth ventricle is one of the causes of shunt malfunction.
	www.emedicine.com /radio/topic150.htm (5727 words)

	Dandy Walker Malformation
		Dandy-Walker Malformation is a rare malformation of the brain that is present at birth (congenital).
		Dandy-Walker Malformation is a form of "Obstructive" or "Internal Noncommunicating Hydrocephalus," meaning that the normal flow of cerebrospinal fluid is blocked resulting in the widening of the ventricles.
		The diagnosis of Dandy-Walker Malformation in a newborn child is confirmed by clinical evaluation and imaging techniques such as ultrasound, CT scan, and MRI (magnetic resonance imaging).
	hw.healthdialog.com /kbase/nord/nord275.htm (1963 words)

	[No title]
		The treatment for the malformation depends on which type of abnormality is present.
		Children who had the type of malformation that involves an anal membrane or a narrow anal passage are usually able to gain good control over their bowel movements after repair of an anorectal malformation.
		Children with more complex variations of an anorectal malformation may have need to participate in a bowel management program in order to help them have control over their bowel movements and prevent constipation.
	www.cdh.org /HealthInformation.aspx?pageid=P02334 (1448 words)

	Anorectal Malformation - Children's Hospital of Philadelphia
		Anorectal malformations are birth defects (problems that happen as a fetus is developing during pregnancy).
		Couples who are gene carriers have a one in four or 25 percent chance for the malformation to reoccur in a future pregnancy.
		Children with more complex variations of anorectal malformation may need to participate in a bowel management program to help them control their bowel movements and prevent constipation.
	www.chop.edu /consumer/your_child/wellness_index.jsp?id=-8782 (1426 words)

	Chiari Malformation Information on Healthline
		Chiari malformation is a congenital anomaly (a condition that is present at birth), in which parts of the brain protrude through the opening in the base of the skull into the spinal column.
		Type II malformation, sometimes called Arnold Chiari malformation, is more severe than Type I and involves herniation of a more significant part of the cerebellum, part of the fourth ventricle, and parts of the brain stem.
		Type II Chiari malformation may be diagnosed prenatally by ultrasound or shortly after birth during medical evaluation of the accompanying spina bifida.
	www.healthline.com /galecontent/chiari-malformation (1116 words)

	Chiari Malformation
		The Chiari malformation, also known as the Arnold-Chairi malformation, is a relatively common syndrome involving displacement of the cerebellar tonsils below the level of the foramen magnum.
		Associated with the Chiari malformation may be hydrocephalus, spina bifida, and syringomyelia.
		The Chiari malformation is generally thought to be present from birth.
	www.dizziness-and-balance.com /disorders/central/cerebellar/chiari.html (544 words)

	eMedicine - Brain, Arteriovenous Malformation : Article by Robert A Koenigsberg, DO, MSc, FAOCR
		The coexistence of migraine and seizures is particularly suggestive of a vascular malformation.
		MRI is the study of choice in the detection of vascular malformations of the spinal cord and spinal dura.
		Dural malformations typically have slower flow or AV shunting and are supplied by dural vessels such as the meningeal branches or occipital arteries of the external carotid arteries or meningeal branches of the internal carotid or vertebral arteries.
	www.emedicine.com /radio/topic93.htm (7579 words)

	Pediatric Neurosurgery - Chiari Malformation (Site not responding. Last check: 2007-10-31)
		Most children with these malformations who do not have spina bifida will have the form known as type I. Essentially there is extra cerebellum crowding the outlet of the brainstem/spinal cord from the skull on its way to the spinal canal.
		These malformations are very difficult to see on CT scans and impossible to see on plain x-rays.
		In general the symptoms of the type I malformations are less severe than that of the type II malformation.
	cpmcnet.columbia.edu /dept/nsg/PNS/ChiariMalformation.html (491 words)

	AVM arteriovenous malformation \| Mayfield Clinic
		An arteriovenous malformation (AVM) is an abnormal tangle of blood vessels in the brain or spine.
		Venous malformation – abnormal cluster of enlarged veins resembling the spokes of a wheel with no feeding arteries; low pressure, rarely bleed and usually not treated.
		In a recent long-term study done at Mayo Clinic, 73% of patients had excellent or good outcomes after radiosurgery and were protected from the risk of future bleeding (2).
	www.mayfieldclinic.com /PE-AVM.htm (1932 words)

	Chiari malformation - MayoClinic.com
		Chiari malformation, also called Arnold-Chiari malformation, is a rare abnormality at the base of the brain that results in brain tissue extending into the upper end of the spinal canal.
		Chiari malformation is unrelated to Budd-Chiari syndrome, a blockage of the hepatic vein that carries blood away from the liver.
		Chiari malformation is divided into several types based on the degree of displacement of the brain tissue into the spinal canal.
	www.mayoclinic.com /health/chiari-malformation/AN00506 (434 words)

	Chiari Malformation, Type I
		Again, it stands to reason that hindbrain malformation would more likely be the result of a longstanding, untreated CMI and, therefore, less likely to occur in cases of minimal CMI.
		Again, it must be stressed that CMI is not a malformation of the hindbrain but, one of the PCF.
		Thomas Milhorat's Chiari Redefined study of 364 patients concluded that the cause of CMI is a volumetrically underdeveloped posterior cranial fossa.
	www.chiarione.org /chiari.html (2195 words)

	Chiari malformation in CFIDS, FMS
		The best known of these conditions is the Chiari malformation, in which the cerebellar "tonsils" (a portion of the cerebellum, shaped like the tonsils in the neck) extend several millimeters through the opening in the base of the skull (the foramen magnum) that allows the spinal cord to attach to the brain.
		The NFRA is funding a $150,000 study to determine the percentage of fibromyalgia patients who have a Chiari malformation or spinal cord compression.
		The Type I Chiari malformation (Type II is related to spina bifida and hydrocephalus and is found in infants) was first identified in 1891 and was considered to be rare before the development of MRI scans.
	www.co-cure.org /chiari.htm (1552 words)

	Cerebral cavernous malformation - Genetics Home Reference
		Cerebral cavernous malformations (CCMs) are collections of small blood vessels (capillaries), usually in the brain, that are enlarged and irregular in structure.
		Cavernous malformations can occur anywhere in the body, but usually produce serious signs and symptoms only when they occur in the central nervous system (brain and spinal cord).
		Mutations in the CCM2, KRIT1, and PDCD10 genes cause cerebral cavernous malformation.
	ghr.nlm.nih.gov /condition=cerebralcavernousmalformation (689 words)

	Anorectal Malformation - Lucile Packard Children's Hospital
		Infants who have the type of malformation that causes the anal passage to be narrow may not need an operation.
		Children who had the type of malformation that involves an anal membrane or a narrow anal passage are usually able to gain good control over their bowel movements after repair of anorectal malformation.
		Children with more complex variations of anorectal malformation may have need to participate in a bowel management program in order to help them have control over their bowel movements and prevent constipation.
	www.lpch.org /DiseaseHealthInfo/HealthLibrary/digest/anorecta.html (1482 words)

	Cavernous Malformation
		Vascular malformations or angiomas are localized collections of blood vessels that are abnormal in structure or number, lead to altered blood flow, and are not cancerous (nonneoplastic).
		Most vascular malformations are present at birth (congenital) and are suspected to arise between three and eight weeks of gestation, but the specific defect in embryogenesis has not yet been identified for each type of malformation.
		The prevalence of cavernous malformations in children is estimated to be between 0.37 and 0.53% (up to 1 in 200 children have a CCM, whether symptomatic or asymptomatic), and approximately 25% of all diagnosed cavernous malformations are found in children.
	www.webmd.com /hw/health_guide_atoz/nord620.asp (900 words)

	CFIDS
		Arnold-Chiari malformation is a neurological condition that causes compression of the brainstem and the spinal cord at the base of the skull.
		Symptoms of Chiari malformation, as it is commonly known, include headache, neck pain, fatigue, swallowing difficulties and numbness and tingling of the extremities.
		Chiari malformation is a structural abnormality in which the bony area at the base of the skull (the posterior fossa) is too small to comfortably contain the cerebellum and the spinal cord.
	www.cfids.org /about-cfids/chiari-malformation.asp (458 words)

	Chiari Malformation and Fibromyalgia
		Depending on the examiner's definition of the Chiari I malformation (as assessed by the amount of descent below the foramen magnum in mm), the incidence of the diagnosis may vary considerably.
		The determination that a Chiari malformation is causing the symptom complex is often complicated by the overlap of symptoms that are similar to some rheumatologic disorders; hence, the alleged association between the Chiari I malformation and the diagnosis of fibromyalgia (FMS) and chronic fatigue (CFS) syndrome.
		Regardless of the presence or absence of an association, it is evident that the complex nature of the diagnosis and treatment of the Chiari I malformation and syringomyelia deserves a comprehensive and methodological approach.
	www.spineuniverse.com /displayarticle.php/article1884.html (1219 words)

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