"Use of the term cerebellar tonsillar ectopia is not uniform. It is sometimes used synonymously with tonsillar descent or low-lying tonsils, although many authors impart specific and distinct meaning to each term, in particular using the latter to refer to benign tonsillar ectopia 6."
"Use of the term cerebellar tonsillar ectopia is not uniform. It is sometimes used synonymously with tonsillar descent or low-lying tonsils, although many authors impart specific and distinct meaning to each term, in particular using the latter to refer to benign tonsillar ectopia 6."
"Chiari 1 malformation"
Expected headings
"Suggested usage"
"Although the former broader usage seems more common, it is worth trying to be as precise as possible to avoid confusion and to use acquired tonsillar ectopia when downward descent of the tonsils is thought to be secondary to another well-defined cause (e.g. intracranial hypertension or craniospinal hypotension)."
"often associated with symptoms or other structural changes (e.g. syrinx)"
"caudal displacement of tonsils is secondary to another defined pathological process (e.g. intracranial hypertension or craniospinal hypotension)"
"best reserved for acute displacement usually seen in the setting of massive raised intracranial pressure (e.g. extradural haemorrhage)"