Chiari type I malformation (CMI) is a congenital hindbrain anomaly characterized by downward displacement of the cerebellar tonsils through the foramen magnum. Chiari type I malformation often presents with a complex clinical picture and can be sporadic or linked to a variety of genetic conditions. We report on a girl in whom Chiari type I malformation was associated with hypoglycemia, headache...

OBJECTIVE The aim of this study was to determine the posterior cranial fossa volume, cerebellar volume, and herniated tonsillar volume in patients with chiari type I malformation and control subjects using stereological methods. MATERIAL AND METHODS These volumes were estimated retrospectively using the Cavalieri principle as a point-counting technique. We used magnetic resonance images taken...

Editor: In the Talal Amer and Omran M. El-Shmam review published in your journal,1 there are two types of classification for Chiari I malformation: type A, which is associated with syringomyelia and type B, which is not associated with syringomyelia. Hans Chiari (1851–1916) first reported Chiari malformation (1891) morphologically as a cerebellar tonsillar herniation with occasional fourth vent...

chiari malformation type i (cm-i) is a congenital disorder, which is basically a tonsillar herniation (≥ 5 mm) below the foramen magnum with or without syringomyelia. the real cause behind this malformation is still unknown. patients may remain asymptomatic until they engender a deteriorating situation, such as cervical trauma. the objective of this case report is to give a broad perspective on...

The Arnold-Chiari malformation is a congenital abnormality of CNS, characterized by downward displacement the parts of the cerebellum, fourth ventricle, pons and medulla oblongata into the spinal canal. This malformation is one of causative factor of death in neonates and infants. A thorough understanding of the direct and indirect sonographic findings is necessary for diagnosis of Chiari II ma...

Single case reports exist in the medical literature of patients with tonsillar ectopia, i.e., the Chiari I malformation and neurofibromatosis type 1. However, large series of patients with either of these entities have not been examined for the presence of both defects. We have retrospectively examined two large groups of pediatric patients: Group I, with the primary diagnosis of Chiari I malfo...

the arnold-chiari malformation is a congenital abnormality of cns, characterized by downward displacement the parts of the cerebellum, fourth ventricle, pons and medulla oblongata into the spinal canal. this malformation is one of causative factor of death in neonates and infants. a thorough understanding of the direct and indirect sonographic findings is necessary for diagnosis of chiari ii ma...

A Chiari malformation Type I may remain asymptomatic until the patient has reached adulthood and acute presentation of symptoms occurs. In several clinical and experimental studies it has been shown that essential hypertension is associated with vascular compression of the brainstem, particularly of the rostral ventrolateral medulla oblongata. Nevertheless, two cases of Chiari malformation and ...

Background: Chiari Malformation type 1 (CM-I) is a congenital disease characterized by downward decent of the cerebellar tonsil and crowding in the craniocervical junction area. There are still obvious controversies for the optimum surgical strategy for Chiari malformation type 1 especially if associated with syringomylia. Objectives: to determine the results of bony decompression with and with...