英和和英

出典:『Wikipedia』 (2011/06/19 22:17 UTC 版)

英語による解説

引用

Acrania is a cephalic disorder of a human fetus characterised by a partial or complete absence of the cranium. The condition is frequently, though not always, associated with anencephaly. The anomaly Acrania is a partial or complete absence of the calvarium with abnormal brain tissue development. This anomaly is lethal in all cases and has important implications for obstetrical management and counseling. Acrania can be diagnosed early in pregnancy through an ultrasound. The fetus is said to suffer from acrania if it meets the following criteria: the fetus should have a perfectly normal facial bone, a normal cervical column but without the fetal skull and a volume of brain tissue equivalent to at least one third of the normal brain size. When no brain or little traces of it are detected, the anomaly is referred to as Anencephaly.