Trisomy 12p syndrome

What it is

A partial autosomal trisomy characterized by developmental delay and intellectual disability, generalized hypotonia, postnatal growth retardation, variable brain and heart anomalies and dysmorphic features, including frontal bossing, round face, full cheeks, low-set ears, broad nasal bridge, short nose with anteverted nares, long philtrum, thin upper lip vermilion, and everted, thick lower lip. Unspecific associated congenital anomalies have also been reported.

Key facts

Prevalence

<1 / 1 000 000

Age of onset

Neonatal

Inheritance

Not applicable, Unknown

Classified as

Malformation syndrome

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Signs and symptoms

These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.

ICD-10 codes

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references