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Bleeding diathesis in Noonan syndrome: a common association
D R Witt1, B C McGillivray, J E Allanson
1Genetics Department, Kaiser Medical Center, San Jose, California 95119.
American Journal of Medical Genetics
|October 1, 1988
Summary
Noonan syndrome (NS) patients frequently experience bleeding disorders due to coagulation and platelet defects. This study reveals bleeding diatheses are more common in NS than previously thought, impacting surgical risk.
Area of Science:
- Genetics
- Hematology
- Pediatrics
Background:
- Noonan syndrome (NS) is a genetic disorder characterized by multiple congenital anomalies.
- Bleeding complications are occasionally reported but not considered a primary feature.
Observation:
- This study investigated 19 patients with Noonan syndrome and a concurrent bleeding diathesis.
- Coagulation and platelet system defects were identified, occurring individually or in combination.
Findings:
- Bleeding diatheses are significantly more frequent in Noonan syndrome patients than previously recognized.
- The observed defects in hemostasis were diverse and varied in clinical presentation.
- A potential link between NS pathogenesis, metabolic defects, and the spectrum of bleeding disorders is suggested.
Implications:
- The high prevalence of bleeding disorders in NS necessitates careful pre-operative evaluation and management strategies.
- Further research into the etiology and pathogenesis of NS may be informed by studying these hemostatic defects.
- Screening for bleeding disorders in all NS patients and their families is recommended for better understanding and care.