Chiari 0
This curious term clearly implies that there is no Chiari malformation present and yet it is not synonymous with “normal”. People diagnosed as having “Chiari
Chiari 1.5
The tonsils of the cerebellum are herniated through the foramen magnum, at the base of the skull, as occurs in Chiari type 1 but, in
Chiari I (type 1)
This is the most common form of Chiari malformation that is seen in adults, where the tonsils of the cerebellum protrude through the foramen magnum
Chiari II (type 2)
Chiari type 2 malformations form during development, inside the womb, and are part of the condition known as spina bifida. Spina bifida is also very
Chiari III (type3)
A rare form of malformation where the cerebellum and brain stem are herniated into a meningocœle, at the back of the neck.
Chiari IV (type4)
A rare form of malformation in which the cerebellum is hypoplastic, which means that it is under-developed.
Chiari malformation
An anatomical abnormality affecting the lowermost part of brain, where it joins the spinal cord, at the top of the neck. Various sub-types are described
Chiari-like malformation
This is a term used in veterinary medicine. Canine species have a cerebellum but do not have cerebellar tonsils. Certain toy breeds, in particular the
Chiari, Hans
An Austrian-born anatomist and pathologist, who first carried out detailed studies of the condition that now bears his name, as its eponymous term. It is
Glossary
The Charity appreciates that hospital specialists will almost inevitably use some medical jargon at times, even when they are trying to explain medical matters in lay terminology. The table below lists many of the medical terms that are likely to be used, from time-to-time, by doctors, when they are talking to patients, or in composing medical correspondence. It is hoped that our explanation of the meaning of these terms throws at least some light on matters.
