The Coffin-Lowry syndrome. Experience from four centres

Area of Science:

• Genetics
• Medical Genetics
• Human Genetics

Background:

• Coffin-Lowry syndrome is a known genetic disorder featuring intellectual disability, characteristic facial features, and skeletal anomalies.
• Understanding its inheritance pattern and diagnostic markers is crucial for accurate diagnosis and management.

Observation:

• This study details 12 cases across eight families, comparing findings with existing literature.
• Key physical findings and pedigree data were analyzed to elucidate the inheritance pattern.

Findings:

• Strong evidence supports X-linked semi-dominant inheritance for Coffin-Lowry syndrome.
• The responsible gene is widely distributed, with a notable proportion of cases arising from new mutations.
• Metacarpal-phalangeal profiles and fingertip dermatoglyphics were not found to be reliable diagnostic indicators.
• Skin biopsies ruled out primary lysosomal or degenerative diseases.

Implications:

• The findings reinforce the genetic basis of Coffin-Lowry syndrome and highlight the significance of new mutations.
• Caution is advised against assuming universal intellectual deterioration in affected individuals.
• Further research may refine diagnostic approaches and understanding of disease progression.