ICD10 code of Cri Du Chat Syndrome and ICD9 code

Cri du chat syndrome is classified under the ICD-10-CM code Q93.4 (Deletion of short arm of chromosome 5) and the older ICD-9-CM code 758.31 (Cri-du-chat syndrome). These diagnostic codes are essential for medical billing, insurance authorization, and tracking the clinical management of patients within global healthcare systems.

What is the clinical definition of Cri du chat syndrome?

Cri du chat syndrome, also known as 5p- syndrome, is a rare chromosomal disorder caused by a deletion of genetic material on the short arm (p arm) of chromosome 5. The condition earns its name—French for "cry of the cat"—from the distinctive, high-pitched, monotone cry often heard in infants with the syndrome. With 104 individuals currently sharing their experiences on DiseaseMaps.org, we recognize that while the clinical presentation is consistent, the severity of Cri du chat syndrome varies significantly based on the size and location of the chromosomal deletion.

How is Cri du chat syndrome diagnosed?

Diagnosis of Cri du chat syndrome is typically confirmed through cytogenetic testing. Physicians use techniques like karyotyping or fluorescence in situ hybridization (FISH) to identify the missing segment of chromosome 5. Because the phenotypic expression of Cri du chat syndrome can overlap with other developmental disorders, genetic testing is the gold standard to distinguish this condition from other chromosomal abnormalities. Early diagnosis is critical to connect families with appropriate early intervention services, such as physical, occupational, and speech therapy.

What are the primary features of Cri du chat syndrome?

While every individual is unique, the clinical profile of Cri du chat syndrome generally includes a specific set of physical and developmental characteristics. Common clinical features observed in the Cri du chat syndrome community include:

• A high-pitched, cat-like cry during infancy (which often improves with age).


• Microcephaly (an abnormally small head size).


• Distinctive facial features, such as low-set ears, a broad nasal bridge, and epicanthal folds.


• Significant developmental delays and intellectual disability.


• Hypotonia (low muscle tone) in infancy, which can lead to feeding difficulties.


• Hyperactivity and potential behavioral challenges as the child grows.

Is Cri du chat syndrome hereditary?

In approximately 80-90% of cases, Cri du chat syndrome is not inherited; it occurs as a "de novo" (sporadic) event during the formation of reproductive cells or in early fetal development. In about 10-15% of cases, the condition results from a balanced translocation in one of the parents, where the parent carries a rearranged chromosome but has no symptoms. For families seeking clarity, a consultation with a clinical geneticist is recommended to perform chromosomal analysis on both parents to understand the recurrence risk for future pregnancies.

Next steps

• Consult a clinical geneticist to verify the specific chromosomal deletion and discuss family planning options.


• Connect with the 104 members of the DiseaseMaps.org community to share experiences and coping strategies.


• Schedule evaluations with a multi-disciplinary team, including pediatric neurologists, speech pathologists, and occupational therapists.


• Register with national organizations like the 5p- Society to access specialized resources and patient registries.

Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician or qualified health provider with any questions regarding a medical condition.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Cri du chat syndrome.


• Orphanet: Deletion 5p syndrome (ORPHA:205).


• Online Mendelian Inheritance in Man (OMIM): #123450 (Cri-du-chat syndrome).


• The 5p- Society: Support and resources for individuals affected by 5p- syndrome.