7q11.23 microduplication syndrome

What it is

7q11.23 microduplication syndrome is a rare chromosomal anomaly syndrome resulting from the partial duplication of the long arm of chromosome 7 characterized by a highly variable phenotype that typically manifests with mild to moderate intellectual disability (patients could be in the normal range), speech disorders (particularly of expressive language), and distinctive craniofacial features (brachycephaly, broad forehead, straight eyebows, broad nasal tip, short philtrum, thin upper lip and facial asymmetry). Hypotonia, developmental coordination disorders, behavioral problems (such as anxiety, ADHD and oppositional disorders) and various congenital anomalies, such as heart defects, diaphragmatic hernia, renal malformations and cryptorchidism, are frequently presented. Neurological abnormalities (visible on MRI) have been reported.

Key facts

Prevalence

1-9 / 100 000

Age of onset

Infancy, Neonatal

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