61. Conditions And Diseases: H | Treasure Coast Health Hydranecephaly@ (8); Hydrocephalus@ (53); hydrosyringomyelia@ (4);Hyperhidrosis@ (32); Hyperhomocysteinemia@ (4); Hyperinsulinemia@(5 http://treasurecoasthealth.com/treasurecoasthealth.php/Health/Conditions_and_Dis

Find Doctors on the Treasure Coast Select Specialty Ambulatory Care Anesthesiology Cardiology Dermatology Emergency Medicine Endocrinology Family Practice Gastroenterology Hematology/Oncology Infectious Diseases Internal Medicine Maxillofacial Surgery Neonatology Nephroology Neurology Neurosurgery Obstetrics/Gynecology Ophthalmology Orthopedic Surgery Otolaryngology Pathology Pediatics Physical Medicine Plastic Surgery Podiatry Psychiatry Psychology Pulmonary Radiation Oncology Radiology Rheumatology Surgery Thoracic Surgery Urology Vascular Surgery Select City Sebastian Palm Bay Vero Beach Fort Pierce Okeechobee Port St. Lucie Jensen Beach Stuart Palm City Hobe Sound Loxahatchee MENU Home Doctor Directory Health Resources Women Only ... About Us Conditions and Diseases: H Hailey-Hailey Disease Hair Loss Hairy Leukoplakia Halitosis ... Hypothyroid Our Sponsers Home Doctors by Specialty Doctors by City Health Resources ... Contact Webmaster We subscribe to the HONcode principles Verify here. Website design RK Productions This page last modified: February 26 2003

62. AMRC - (Association Of Medical Research Charities) - Member Charities Example of Current Research Activities Musgrave Park Hospital, Belfast Study ofthe Chiari malformation and the hydrosyringomyelia complex in adults with http://www.amrc.org.uk/orgs/amrc_7575505.html

Charity Search ASSOCIATION FOR SPINA BIFIDA AND HYDROCEPHALUS (ASBAH) ASBAH House 42 Park Road Peterborough Telephone Fax URL www.asbah.demon.co.uk Link Category AMRC Member Email postmaster@asbah.demon.co.uk Registered Charity Number Category Neurology Reference List Junior Non-clinical Project Grants UK only Simultaneous Application CM Chief Executive Andrew Russell Objects and Special Interests ASBAH works for people with spina bifida and/or hydrocephalus. ASBAH lobbies for improvements in policy/legislation; provides advisory and support services; provides information to clients and professionals; sponsors medical and educational research. Types of Awards Available Project grants. One junior non-clinical research fellowship. Restrictions UK only. Grant applications must relate directly to neural tube defects/hydrocephalus. Contact for Grant Enquiries and Applications Lyn Rylance, Secretary to the Directorate. E-mail: lynr@asbah.org Method of Research Fund Allocation Following review by the Medical Advisory Committee and, if appropriate, external referees. Submission of Applications Initially by letter to the Executive Director, giving a brief description of proposed research.

63. Privattandvård I Örebro, Tandläkaren Michel Deaibes, Sjukdomslista På Engels Homocystinuria. Hughes Syndrome. Hydranecephaly. Hydrocephalus. hydrosyringomyelia.Hyperhidrosis. Hyperhomocysteinemia. Hyperinsulinemia. Hyperlipidemia. Hyperopia. http://www26.brinkster.com/privtand/sjuk.htm

A Aarskog Syndrome Aase Syndrome Abetalipoproteinemia Ablepharon-Macrostomia Syndrome Achilles Tendonitis Achondroplasia Acoustic Neuroma Acromegaly Activated Protein C Resistance Acute Idiopathic Polyneuritis ADD and ADHD Addiction and Recovery Addison's Disease Adiposis Dolorosa Adjustment Disorders Adrenoleukodystrophy Agnosia Agoraphobia Aicardi Syndrome AIDS Alagille Syndrome Albinism Alcoholism Alexander Disease Alkaptonuria Allergies Alopecia Alpers' Disease Alpha1 Antitrypsin Deficiency Alport Syndrome Alstrom Syndrome Alternating Hemiplegia Altophobia Alzheimer's Amblyopia Amputee Amyloidosis Amyoplasia Congenita Amyotrophic Lateral Sclerosis Anal Fissures Anemia Anencephaly Aneurysm Angina Pectoris Anophthalmos Anorexia Anosmia Anterior Knee Pain Syndrome Antiphospholipid Syndrome Anxiety Aortic Valve Disease Apert Syndrome Aphasia Aplastic Anemia Apnea, Sleep Appendicitis Arrhythmia Arteriohepatic Dysplasia Arthritis Arthrogryposis Asbestosis Asperger's Syndrome Aspergillosis Asthma Atherosclerosis Athlete's Foot Atrial Fibrillation Attachment Disorder Attention Deficit Disorder Autism Auto Immune Disorders Aviophobia Aviatophobia B Bacillary Angiomatosis Back Disorders Bad Breath Balanitis Baldness Barth Syndrome Bassen Kornzweig Syndrome Batten Disease Beckwith-Wiedemann Syndrome Behcet's Syndrome Bell's Palsy Benign Breast Lumps Benign Prostatic Hyperplasia Berger's Disease Beriberi Beryllium Disease Besnier Boeck Disease Betalipoprotein Deficiency Disease

64. Frontiers In Fetal Health - 2000 Vol.2 No.7 j. Number of subsequent surgical procedures of any kind (ie, neurosugical proceduresfor shunt revisions, tethered cord, hydrosyringomyelia, procedures for http://www.sickkids.on.ca/FrontiersinFetalHealth/FFHJuly2000.asp

Go back to The Fetal Centre Go back to Archives of Frontiers in Fetal Health Table of Contents Vol. 2 No. 7 July 2000 click to view Letter From the Editor Anne Pastuszak - Toronto, Ontario, Canada The Role of Molecular Genetic Testing in Fetal Health McMaster University Prenatal Diagnosis Rounds Neural Tube Defects Ma l Organization of Teratology Information Services (OTIS) Fact Sheet : ACCUTANE The University of California at San Francisco Approach to Fetal Myelomeningocele - A Randomized Trial Diana Farmer - San Francisco, California, USA Role of Peroxisome Proliferator-Activated Receptors in Development Jeffrey Peters - University Park, Pennsylvania, USA Retinoid Signaling and Embryogenesis Devendra Kochhar - Philadelphia, Pennsylvania, USA Abstracts from the 18 th Various Authors - Toronto, Ontario, Canada ECLAMC Informs 00/2 Guidelines for Authors - click here Letter From the Editor Anne L. Pastuszak, BSc., MSc., PhD

65. Neuroradiology tonsils into postlat cerv subarachnoid NOT assoc w open spinal dysraphia or brainmalformation IS assoc w basilar skull defects hydrosyringomyelia Chiari II http://radiology.creighton.edu/Neuroradiology2.html

Intracranial Trauma CRANIOCEREBRAL TRAUMA MECHANISMS OF INJURY Projectile Injuries Nonprojectile Injuries PRIMARY LESIONS CAUSED BY TRAUMA lesion directly from initial trauma penetrating injury - av fistula or psuedoaneurysm poss assoc w superficial temporal or occipital vessels subgaleal extrusion of brain thru a comminuted skull fx 2. Skull - fx in 60% of acute head injury, 25% of severe none Fx occurs by Tension rater than compression plain film evidence of fx is irrelevent in acute care May "grow" in child due to leptomeningeal protrusion Depressed fx - assoc w parenchymal inj, less hem Rhinorrhea or otorrhea - CSF out Temporal Bone Fx - Longitudinal 90%, parallel petrous bone 3. Epidural Hematoma - 1% of head trauma, 10% of fatal injury Lucid Interval - delay before deterioration in 50% usually occur within 24-48 hrs, 20% after neg CT Fx lacerates the mid meningeal art or dural sinus in 95% Biconvex, Strips dural attachments, can't cross suture Poor outcomes II' to delay, may autodecompress thru fx II' herniations common CANNOT cross sutures unless origin is sagital sinus usually at site of inj, subdural can be countercoup

66. Pediatrics: Complete Spontaneous Resolution Of Childhood Chiari I Malformation A 1997;26190196. 7. Isu T, Iwasaki Y, Akino M, Abe H. hydrosyringomyelia associatedwith Chiari I malformation in children and adolescents. Neurosurgery. http://www.findarticles.com/cf_0/m0950/1_107/69651854/p4/article.jhtml?term=syri

67. Browsing Health Conditions And Diseases H Category HolmesAdie Syndrome Homocystinuria Horner Syndrome Huntington's Disease HydranecephalyHydrocephalus hydrosyringomyelia Hyperhidrosis Hyperhomocysteinemia http://www.uksprite.com/search/search/Health/Conditions_and_Diseases/H/

68. CHIARI MISVORMING - SYRINGOMYELIE 1900. Het onderscheid werd alsmaar vager 1971 Ballantine ‘hydrosyringomyelia’;1988 Rhoton ‘Syringomyelia syndrome’. Naarmate http://users.pandora.be/zeldzame.ziekten/List.a/Acm-syr(1).htm

CHIARI MISVORMING SYRINGOMYELIE Terug naar trefwoordenlijst Voordracht Prof Dr Frank Van Calenbergh Syringomyelie - Definitie - Geschiedenis van syringomyelie - Indeling van syringomyelie Chiari misvorming - Chiari I - Chiari II - Chiari III Syrinx bij Chiari misvorming Symptomen van Syringomyelie Natuurlijk verloop van Syringomyelie Symptomen van Chiari misvorming ... Behandeling van Syringomyelie - Basis behandelingsschema - Richtlijnen voor volwassenen - Richtlijnen voor kinderen Medische vooruitgang Syringostomy Foramen Magnum Decompressie Beelden Voordracht Prof Dr Frank Van Calenbergh 28 april 2001 In november 2000 heb ik gesproken over de bouw (anatomie) van hersenen en ruggenmerg en over de aanmaak en de stroming van het hersenvocht in normale toestanden. Daarbij heb ik syringomyelie en Chiari misvorming vermeld als aandoeningen waarbij deze processen gestoord zijn. Vandaag bespreek ik in detail de ziekten syringomyelie en Chiari misvorming. SYRINGOMYELIE Definitie De term omsluit een nogal brede waaier van ziekten zodanig dat er soms over verschillende zaken gesproken wordt als men het woord syringomyelie gebruikt. Hier ziet men een syrinx. Dat woord is het Grieks voor rietstengel of buis. Een syrinx is inderdaad zoals een rietstengel samengesteld uit stukken holle buis, soms met elkaar verbonden en soms met tussenschotten. Myelum is ruggenmerg. Syringomyelie is dus een buisvormige holte in het ruggenmerg.

69. Www.patientcenters.com -- Hydrocephalus Centeri -- What Is Hydrocephalus This may be asymptomatic or be associated with cranial nerve dysfunctionor fluid buildup in the spinal cord (hydrosyringomyelia). Type II. http://www.patientcenters.com/hydrocephalus/news/whatishydro.html

PATIENT-CENTERED GUIDES Catalog Patient Centers Home Hydrocephalus ... Center Home Congenital hydrocephalus... can be traced to a birth defect or brain malformation In 1983, at the age of 13, I acquired hydrocephalus when I was hit in the head by a baseball. It was a freak accident. The term "communicating hydrocephalus" means that the site of increased resistance to CSF drainage resides outside of the ventricular system in the subarachnoid space. Non-communicating, or obstructive, hydrocephalus is caused when there is an obstruction in the flow of CSF within the ventricular system of the brain. Hydrocephalus is often associated with Dandy-Walker syndrome, neural tube defects, and spinal bifida. CSF is constantly being produced, flowing through, bathing, protecting, and cleansing the structures of your brain.... To communicate effectively with neurosurgeons, patients who have hydrocephalus need to become familiar with the basic structures of the brain. The effect that hydrocephalus has on an area of the body greatly depends on where the blockage or abnormal accumulation of CSF is located. Hydrocephalus occurs when there is an obstruction of one of the ventricles or ventricular foramina (CSF passageways) that restricts the flow of CSF What is Hydrocephalus?

70. Neurosurgery-Children's Hospital, Faculty, R. Michael Scott, M.D. Sathi S, Filiano J, Scott RM. The development of Chiari I malformation andhydrosyringomyelia on sequential MRI scans in a threeyear-old child. http://www.boston-neurosurg.org/faculty/scott2.html

Faculty Information R. Michael Scott, M.D. to Page 1 Memberships, Offices, and Committee Assignments in Professional Societies: Massachusetts Medical Society New England Neurosurgical Society (Trustee, 1991- 3) Congress of Neurological Surgeons (Joint Committee on Graduate Education, 1983-1986) Boston Surgical Society Boston Society of Neurology and Psychiatry Executive Committee, 1990- President, 1998-9 American Association of Neurological Surgeons Board of Directors, 1995-8 Long Range Planning Committee, 1995-7 American Heart Association (Fellow, Stroke Council) American College of Surgeons (Credentials Committee, 1988-1992) International Society of Pediatric Neurosurgery Nominating Committee, 1988-1989 Scientific Program Committee, 1991-1993 Pediatric Section of the American Association of Neurological Surgeons Secretary-Treasurer, 1985-1988 Executive Council, 1988- 1995 Chairman, 1991- 3 Traveling Fellowship Committee, Chairman, 1996 - Nominating Committee, 1994 - 7 American Society of Pediatric Neurosurgeons Executive Council, 1988-98

71. H Website Results :: Linkspider UK Hydranecephaly@ (8); Hydrocephalus@ (53); hydrosyringomyelia@ (4);Hyperhidrosis@ (30); Hyperhomocysteinemia@ (4); Hyperinsulinemia@ (20 http://www.linkspider.co.uk/Health/ConditionsandDiseases/H/

H Websites from Linkspider UK Keyword: H Linkspider UK Directory H Search for Directory Tree: Top Health Conditions and Diseases : H (0) Add URL Advertise Here! Personalize Amazon ... Hypothyroid

72. Pediatric Radiology Goals And Objectives myelomeningocele/meningocele 2. lipomyelomeningocele 3. diastematomyelia 4. tetheredcord 5. dermal sinus 6. intradural lipoma 7. hydrosyringomyelia B. Tumors l http://radiology.ouhsc.edu/pages/pedgoals.html

Pediatric Radiology Residency Curriculum From: Dr. Faridali G. Ramj i; Pediatric Radiologist/Assistant Professor Children's Hospital Of Oklahoma, OUHSC Date:July 11th, 2000 There are two parts to this curriculum: 1:The first part (PAGES 5-16) is the actual curriculum in pediatric radiology for diagnostic radiology residents, which was compiled by The Society of Pediatric Radiology and has been published in the Pediatric Radiology Journal, 1995; 25: 403-407, and also on the internet in the public domain. This has been retyped) and arranged in sections: Cardiovascular System; Gastrointestinal System; Genitourinary System; Neuroradiology; Chest and Airway; and Musculoskeletal System. This is an excellent overview by systems and it is very important to read around each of the topics and to be very familiar about it. Please ask Dr. Faridali G. Ramj i ( or Gina Laws) for a copy of the second part of this paper for the case numbers. They are not part of the web site as this time There is no doubt you will find some errors and thus I would sincerely hope that I can get some feed back on this large document, typed in entirety by myself. If there is any oversight in any sections or parts, then please bring it to my attention so that this can be revised in the future. Thank you and good luck.

73. Katalog Health Conditions_and_Diseases H - Netz-Tipp. hydrosyringomyelia(*); Hyperhidrosis (*); Hyperhomocysteinemia (*); Hyperinsulinemia http://www.netz-tipp.de/kat/Health/Conditions_and_Diseases/H/

74. ECR '99 - Presentation 581 Is there more than one lesion? Is there hydrosyringomyelia? Where is theposition of the conus medullaris? How wide is the spinal canal? http://www.ecr.org/Conferences/ECR1999/sciprg/abs/p000581.htm

Spinal canal disorders in children: a combined neuroradiologic-neurosurgical approach using MRI P. Winkler Close communication and mutual learning between different medical professionals is essential in pediatric CNS diseases to accommodate increasing knowledge, integrate specialization and best use rapidly expanding imaging potential. We will supply some material and answers to central questions in 3 selected fields of pediatric spinal diseases: trauma, tumor and tethered cord. Selected questions are: (1) which embryologic and biomechanical knowledge is necessary for performing an adequate study? (2) what does the surgeon want to know from imaging modalities? (3) What does the radiologist need to understand from principles of surgical treatment? (4) Which of the neurosurgeon's questions can or cannot be answered by the radiologist? (5) Which MR-techniques are most helpful? Representative pediatric spinal MR-studies will be presented in their clinical context using basic principles and interactive neurosurgical - neuroradiological discussion. [ presentation ] [ index ]

75. DINO - Language: Englisch - Health - Conditions And Diseases - H Hydranecephaly Dieser Link verweist auf eine HauptKategorie Hydrocephalus DieserLink verweist auf eine Haupt-Kategorie hydrosyringomyelia Dieser Link http://www.dino-online.de/dino_page_5eb30c831041b37311023286c4a3ca2d.html

Suche Profi-Suche Katalog Video ... Produkte Suchen: Web-Seiten Video Audio Bilder Produkte Schon gewusst? Hier suchen Sie in 2 Milliarden Webseiten. Live-Suche: Was suchen andere Dino-Besucher? You are here: DINO Language Englisch Health ... Conditions and Diseases H H Sprache/Language Categories Hailey-Hailey Disease Hair Loss Hairy Leukoplakia Halitosis Hall-Pallister Syndrome Hallervorden-Spatz Syndrome Hansen's Disease Hantavirus Hay Fever Headaches Hearing Disorders Heart Attack Heart Diseases Heart Failure Heart Murmurs Heart Transplant Heartburn Heat Related Injuries Heel Spurs Helicobacter Pylori Hemangiomas Hematuria Hemihypertrophy Hemiplegia Alterans Hemiplegic Migraine Hemochromatosis Hemolytic Anemia Hemolytic Uremic Syndrome Hemophilia Hemorrhagic Fevers Hemorrhoids Hepatic Encephalopathy Hepatitis Hepatocerebral Encephalopathy Hepatolenticular Degeneration Hereditary Angioedema Hereditary Deafness-Retinitis Pigmentosa Hereditary Sensory Motor Neuropathy Hereditary Sensory Neuropathy Type III Hereditary Spastic Paraplegia Hernia Herniated Lumbar Disk Herpes Hidradenitis Suppurativa Hirsutism Histoplasmosis Hives Hodgkin's Disease Holmes-Adie Syndrome Homocystinuria Horner Syndrome Huntington's Disease Hydranecephaly Hydrocephalus Hydrosyringomyelia Hyperhidrosis Hyperhomocysteinemia Hyperinsulinemia Hyperlipidemia Hyperopia Hyperparathyroidism Hypertension Hyperthyroid Hypochondria Hypoglycemia Hypoparathyroidism Hypopituitarism Hypospadias Hypotension Hypothermia Hypothyroid This site is based on the

76. 1999 Recalls interdigitated falx; hydrosyringomyelia. Answer D hydrosyringomyeliadefn coexistence of hydromyelia and syringomyelia hydro http://www.radquiz.com/1999_recalls.htm

Browse by Subspecialty Breast Imaging Cardiac Imaging Chest Imaging Gastro-Intestinal Imaging Genital (Female) Imaging Genital (Male) Imaging Interventional Radiology Liver, Biliary System, Pancreas, Spleen Muskuloskeletal System Neuroradiology Pediatric Radiology Uroradiology Vascular Imaging RadQuiz.com...Your Gateway to Radiology Teaching Files and Resouces on the Web Neuro Vascular GI GU ... Physics Which of the following is associated with Luckenshcadel skull. myelomeningocele diastematomyelia hydrocephalus other choices not remembered Answer: A: defn: a condition marked by defective calcification of the skull bones, combined with meningocele or encephalocele. This is often seen in Chiari 2 malformation. (Dorland’s). -disappears by 4-6 months of age, not a manifestation of hydocephalus as was once thought, represents defective membranous bone formation, but precise etiology unknown, most frequently only the inner table and diploe are involved, dura is thinned over the lacunae, but is of normal thickness over the intervening bony struts,(Swischuck pg 934) Chiari I malformation is associated with: thickened massa intermedia tectal beaking interdigitated falx hydrosyringomyelia Answer: D: Hydrosyringomyelia: defn: coexistence of hydromyelia and syringomyelia: hydro defn: a pathologic condition in which there is dilatation of the central canal of the spinal cord with accumulation of fluid.

77. RadiologyResources - Nuclear Med.Teaching Cases What is associated with Chiari I malformation A. Beaked tectum B. ElevatedTorcula C. Cervical hydrosyringomyelia D. Elongated Fourth Ventricle E http://www.radquiz.com/Peds-Questions.html

Browse by Subspecialty Breast Imaging Cardiac Imaging Chest Imaging Gastro-Intestinal Imaging Genital (Female) Imaging Genital (Male) Imaging Interventional Radiology Liver, Biliary System, Pancreas, Spleen Muskuloskeletal System Neuroradiology Pediatric Radiology Uroradiology Vascular Imaging RadQuiz.com...Your Gateway to Radiology Teaching Files and Resouces on the Web Neuro Vascular GI GU ... Physics 1998/1997 Peds Questions 1997 -PEDS TRUE/FALSE Regarding developmental dysplasia of the hip (DDH): 1. Acetabular angle greater than 30 degrees indicates normal acetabular development 2. Often involves delayed ossification of the femoral head 4. After reduction in SPICA cast, the best way to F/U is with AP film of the pelvis ANS: F, T (?), F, T Regarding Neuroblastoma: 5. Better prognosis if located in thorax 6. May present with ophthisclonus

78. Untitled More MS news articles for April 2002 hydrosyringomyelia in demyelinatingdiseases http//www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd http://www.mult-sclerosis.org/news/Apr2002/MedlineDevicsSyndromeAndMS.html

More MS news articles for April 2002 Hydrosyringomyelia in demyelinating diseases Neurologia 2002 Mar;17(3):165-169 Mabel Gatto E, Reisin R, Nogues M, Uribe Roca M, Dominguez R, Giannaula R, Zurru M, Rugilo C. Departamento de Neurologia. Sanatorio Mitre. FLENI. Hospital Britanico. Hospital Sirio Libanes. Hospital Espanol. Buenos Aires. Argentina. Spinal cord cavitation is a frequent finding in optic neuromyelitis (Devic's syndrome) (DS) but it is also, although rarely, observed in patients with multiple sclerosis (MS). The objective of our study was to compare the MRI characteristics of the syringomyelic cavities in 6 patients with DS and 3 patients with MS. All the patients with DS had a relapsing clinical form with normal brain MRI. Spinal MRI revealed unenhanced central cavities which extended more than 3 vertebral bodies and remained unchanged in follow-up studies. Two patients presented multiple cavities.MS patients suffered a relapsing remitting form of the disease, they all had hyperintense T2 enhancing lesions on their spinal MRI. Moreover spinal MRI also revealed non communicating cavities which extended less than 2 vertebral bodies.

79. Definition Of The Adult Chiari Malformation: A Brief Historical Overview J Pediatr Endocrinol Metab 13849851, 2000; Isu T, Iwasaki Y, Akino M, et alhydrosyringomyelia associated with a Chiari I malformation in children and http://www.cfs.inform.dk/Chiari/alden.etal01.htm

Surgical Treatment of Chiari I Malformation: Indications and Approaches Tord D. Alden, M.D. Jeffrey G. Ojemann, M.D. , and T. S. Park, M.D. , Department of Neurosurgery, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri [Neurosurg Focus 11(1), 2001. © 2001 American Association of Neurological Surgeons] Abstract Chiari I malformation is a well-described entity characterized by hindbrain herniation through the foramen magnum. Although the exact origin of congenital Chiari I malformation is unknown, it appears to be caused by a mismatch between the volume of the posterior fossa neural elements and the posterior fossa cranial content. Several theories have been proposed to describe the resultant pathophysiology of this mismatch. It is clear, however, that abnormal cerebrospinal fluid flow and velocity play a role in the symptoms and signs associated with this disorder. The authors will review the pathophysiology, clinical presentation, and treatment options for patients with Chiari I malformation. Introduction In 1891, Chiari presented his series conducted in autopsy examinations of patients with cerebellar ectopia in which he classified Type I as "elongation of the tonsils and medial parts of the inferior lobes of the cerebellum into cone-shaped projections, which accompany the medulla oblongata into the spinal canal."

80. Chiari Long tract signs Demylinating like sx. Associations hydrosyringomyelia(3060%);Hydrocephalus(20-25%); Basilar invagination(25-50%); http://www.ohsu.edu/ps-DiagRadiol/kojima/chiari.htm

Chiari Chiari I Tonsilar herniation 1st Decade: 6 mm 2-3th Decade: 5 mm 4-8th Decade: 4 mm 9th Decade: 3 mm Long tract signs Demylinating like sx Associations Hydrosyringomyelia(30-60%) Hydrocephalus(20-25%) Basilar invagination(25-50%) Klippel-Feil(5-10%) Atlantooccipital assimilation(1-5%). Chiari II Neural tube defect->CSF leakage->Decomp vents->Decreased induction by mesenchyme->Small post fossa->Lacunar skull (luckenschadel) Fenestrated falx Heart shaped incisura and hypoplastic tentorium Gaping foramen magnum Concave clivus, petrous ridges Inferiorly displaced vermis Medullary kink and spur Beaked tectum Interdigitated gyri Cerebellum creeps around brainstem and towers through wide tentorial incisura Callosal dysgenesis, hetereotopia, polymicrogyria, Stenogyria-compacted narrow gyri Hydrocephalus in 90% Elongated 4th ventricle Large massa intermedia Third v may be high riding if corpus callosum is absent Colpocephaly-large atria and occ horns Lateral ventricle-scalloped pointed walls Lemon shape skull on US (flattening of both frontoparietal bones)->open spinal defects. Nonspecific, and normal fetuses can have mild forms of it Banana sign-curved cerebellum because it is pulled down, obliterating the cisterna magna. Should be seen in 90% of cases.

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