Congenital malformations, deformations and chromosomal abnormalities
Congenital malformations of the nervous system
Microcephaly Q02- >
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as Q02. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
"Includes" further defines, or give examples of, the content of the code or category.
- A congenital abnormality in which the cerebrum is underdeveloped, the fontanels close prematurely, and, as a result, the head is small. (desk reference for neuroscience, 2nd ed.)
- A congenital or acquired developmental disorder in which the circumference of the head is smaller than normal for the person's age and sex. It is the result of brain developmental delay.
- Abnormal smallness of the brain.
- Smallness of the head produced by incomplete development of the brain, often associated with below normal mental and cognitive development.