macrocephaly
Pronunciation: mak-roh-SEF-ah-lee
Abnormally large head circumference, typically defined as greater than two standard deviations above the mean for age and sex.
Full Definition
Macrocephaly refers to a head circumference that exceeds the 98th percentile or is more than two standard deviations above the mean for a child's age and sex. In pediatric neurology documentation, this condition may be associated with various underlying pathologies including hydrocephalus, brain tumors, or genetic syndromes. Editors must distinguish between macrocephaly (large head) and megalencephaly (large brain). The condition requires careful measurement documentation and may indicate need for neuroimaging studies.
Usage
Usage note: Always verify correct spelling and distinguish from megalencephaly, which refers specifically to brain enlargement.
In Context
- "The patient presented with progressive macrocephaly noted during routine pediatric visits." — Clinical assessment report
- "Serial head circumference measurements confirmed macrocephaly with crossing of percentile lines." — Growth documentation