Macrocephaly
HP:0000256
HP:0005491
HP:0005496
Large head
Large head circumference
Macrocephaly can be due to hydrocephalus (increased CFSF), megalencephaly (increased brain volume) or thickening of the skull. Head circumference is measured from just above the glabella (the most prominent point on the frontal bone above the root of the nose) to the most posterior prominent point of the occipital bone using a tape measure. Some standard charts are organized by centiles [Hall et al. [2007]], others by standard deviations [Farkas, [1981]]. It is important to add an indication of how far above the normal standard the head circumference is if an accurate assessment of this can be made. Macrocephaly is an absolute term. The term relative macrocephaly can be used when the head size centile exceeds the centile for height, for example, head size at the 75th centile with height at the 5th centile for age and sex.
Macrocrania
Occipitofrontal (head) circumference greater than 97th centile compared to appropriate, age matched, sex-matched normal standards. Alternatively, a apparently increased size of the cranium.
UMLS:C4083076
UMLS:C4255213
UMLS:C4280663
UMLS:C4280664
HP:0200135
Increased size of cranium
Large skull
Megacephaly
Fyler:4335
Large calvaria
Increased size of skull
Big calvaria
Big head
Increased size of head
Large cranium
Big cranium
Big skull
Increased head circumference