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A condition, either congenital or acquired, in which the head is abnormally large; usually applied to an adult cranium with a capacity of over 1450 mL.
Synonym(s): leontiasis ossea, macrocephaly, macrocephalia, megacephalia, megalocephaly, megalocephalia, Virchow disease
[mega- + G. kephalē, head]
macrocephalia, macrocephaly (mak″rō-sĕ-fā′lē-ă) (mak″rō-sef′ă-lē) [ macro- + cephal- + -ia]
Abnormally large size of the head. It is found in acromegaly, hydrocephalus, rickets, Paget's disease, leontiasis ossea, myxedema, leprosy, and pituitary disturbances.macrocephalicmacrocephalous (mak″rō-sĕ-fal′ik) (mak″rō-sef′ă-lŭs), adjective