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Smith-Lemli-Opitz syndrome in siblings.
1Department of Paediatrics, University Medical School of Pécs, Hungary.
Acta Paediatrica Hungarica
|January 1, 1992
Summary
Smith-Lemli-Opitz syndrome (SLOS) can present with incomplete expression, making diagnosis challenging. Combining clinical data from affected siblings is crucial for accurate SLOS diagnosis.
Area of Science:
- Genetics
- Developmental Biology
- Clinical Medicine
Background:
- Smith-Lemli-Opitz syndrome (SLOS) is an autosomal recessive disorder caused by mutations in the DHCR7 gene.
- SLOS is characterized by a spectrum of clinical features, including intellectual disability, behavioral problems, and physical abnormalities.
- Incomplete or variable expression of SLOS can complicate diagnosis, particularly in milder cases.
Observation:
- This study describes two brothers with apparent incomplete expression of Smith-Lemli-Opitz syndrome.
- Initial assessment of each child individually did not lead to a definitive diagnosis.
- A conclusive diagnosis was achieved only after considering the combined clinical manifestations of both siblings.
Findings:
- The combined clinical features of the two brothers were essential for recognizing the pattern consistent with Smith-Lemli-Opitz syndrome.
- This case highlights that subtle or incomplete expression of SLOS in individual patients may obscure the diagnosis.
- Syndromic diagnosis can be facilitated by evaluating affected family members together.
Implications:
- Recognizing variable and incomplete expression is critical for the timely diagnosis of genetic disorders like SLOS.
- Pediatricians and geneticists should consider familial evaluation when encountering patients with atypical presentations of known syndromes.
- Early and accurate diagnosis of SLOS allows for appropriate management and genetic counseling.