Preferred Label : GAIA Level 1b Prenatally Diagnosed Congenital Microcephaly;
NCIt synonyms : Global Alignment of Immunization safety Assessment in pregnancy Level 1b Prenatally
Diagnosed Congenital Microcephaly;
NCIt related terms : Level 1b Prenatally Diagnosed Congenital Microcephaly;
NCIt definition : GAIA Level 1b Prenatally Diagnosed Congenital Microcephaly is defined by three criteria:
first, the fetus is at least 24 weeks gestational age (GA) based on uncertain last
menstrual period (LMP) date with a 2nd trimester ultrasound (US) scan; second, a head
circumference (HC) measurement either 2 standard deviations (SD) below the mean or
less than the third percentile according to fetal US examination, using appropriate,
standardized reference charts according to GA and gender for the population (e.g.
WHO growth reference charts if GA greater than or equal to 37 weeks and Intergrowth-21st
reference charts for GA 24-36 weeks); third, confirmation of microcephaly (i.e., HC
2 SD below the mean or less than 3%) in the fetus by either at least one additional
US after 24 weeks that occurs at least one week after the first US, OR confirmation
of microcephaly by HC measurement with a standard tape measure at either birth or
autopsy.;
Alternative definition : GAIA: Level 1b Prenatally Diagnosed Congenital Microcephaly is defined by three criteria:
first, the fetus is at least 24 weeks gestational age (GA) based on uncertain last
menstrual period (LMP) date with a 2nd trimester ultrasound (US) scan; second, a head
circumference (HC) measurement either 2 standard deviations (SD) below the mean or
less than the third percentile according to fetal US examination, using appropriate,
standardized reference charts according to GA and gender for the population (e.g.
WHO growth reference charts if GA greater than or equal to 37 weeks and Intergrowth-21st
reference charts for GA 24-36 weeks); third, confirmation of microcephaly (i.e., HC
2 SD below the mean or less than 3%) in the fetus by either at least one additional
US after 24 weeks that occurs at least one week after the first US, OR confirmation
of microcephaly by HC measurement with a standard tape measure at either birth or
autopsy.;
NCI Metathesaurus CUI : CL509112;
Origin ID : C128763;
UMLS CUI : C4289184;
Semantic type(s)
- concept_is_in_subset
