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Ring chromosome 9 in a dysmorphic child.

Jayesh Sheth¹, Rajesh Joshi, Frenny Sheth

¹FRIGE (Foundation for Research in Genetics and Endocrinology) Genetic Centre, 20/1, Bima Nagar, Satellite, Ahmedabad, India.

Indian Journal of Pediatrics

|May 29, 2007

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Ring chromosome 9 is a rare genetic disorder. Karyotype analysis is crucial for diagnosing children with this condition and its associated dysmorphic features.

Area of Science:

Genetics
Clinical Genetics
Pediatric Genetics

Background:

Ring chromosome is a rare genetic disorder with diverse clinical presentations.
Ring chromosome 9 (r(9)) often presents with subtle or indistinct clinical features.
Early diagnosis and management are vital for children with genetic disorders.

Observation:

An infant boy presented with microcephaly, short stature, failure to thrive, broad dark eyebrows, and a protruding tongue.
Genetic analysis revealed the karyotype 46,X,inv(Y),r(9)(p24q34).
This specific karyotype indicated the presence of a ring chromosome 9.

Findings:

The patient's clinical presentation, though variable, was linked to the presence of ring chromosome 9.
The karyotype study confirmed the genetic anomaly, r(9)(p24q34).

Related Experiment Videos

This case highlights the diagnostic challenge of r(9) due to its less distinct features.

Implications:

Karyotype study is an essential diagnostic tool for children with dysmorphic features.
Accurate genetic diagnosis aids in appropriate clinical management and genetic counseling.
Understanding the phenotype-genotype correlation in ring chromosome disorders is crucial for patient care.