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6q1 monosomy: a distinctive syndrome
C Turleau1, G Demay, M O Cabanis
1INSERM U.173, UA.119 CNRS, Hôpital Necker-Enfants-Malades, Paris, France.
Insights
A new syndrome associated with a deletion on chromosome 6 (del 6q) has been identified. Key features include severe intellectual disability, distinctive facial features, and limb abnormalities.
Area of Science:
- Genetics
- Clinical Medicine
- Developmental Biology
Background:
- The genetic basis of many developmental syndromes remains incompletely understood.
- Chromosome 6 deletions (del 6q) have been associated with various congenital anomalies.
Observation:
- A de novo deletion on chromosome 6 (del 6q14q16.2) was identified in a female infant.
- Five additional cases of del 6q from existing literature were analyzed.
Findings:
- A distinct syndrome characterized by severe mental retardation, round face with full cheeks, upslanting palpebral fissures, short neck, umbilical hernia, and malpositioned feet with syndactyly II-III was delineated.
- Characteristic dermatoglyphics, including an excess of whorls and clinodactyly of the Vth finger, were noted.
Implications:
- This delineation aids in the diagnosis and understanding of del 6q syndrome.
- Further research into the specific genes within the deleted region can elucidate the molecular mechanisms underlying these clinical features.
Abstract:
A female infant with a de novo del 6q14q16.2 and five other patients with del 6q1 reported in the literature allow the delineation of a characteristic syndrome, the main features of which are: severe mental retardation, a round face with full cheeks, upslanting palpebral fissures, a short neck, umbilical hernia, malpositioned feet with syndactyly II-III, and typical dermatoglyphics with an excess of whorls and clinodactyly of the Vth finger.