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Chiari type I malformation in four unrelated patients affected with Fabry disease
Dominique P Germain1, Karelle Benistan, Philippe Halimi
1Assistance Publique - Hôpitaux de Paris, Department of Genetics, Hôpital Européen Georges Pompidou, 20, rue Leblanc, 75015 Paris, France. dominique.germain@egp.aphp.fr
Insights
Fabry disease (FD) patients may have a higher incidence of Chiari type I malformation (CMI). Screening for CMI is recommended in individuals with FD to rule out this neurological condition.
Area of Science:
- Neurology
- Metabolic Disorders
- Genetics
Background:
- Fabry disease (FD) is an X-linked metabolic disorder caused by alpha-galactosidase A deficiency, leading to glycosphingolipid accumulation.
- Neurological complications, including stroke and transient ischemic attacks (TIA), are known manifestations of FD.
Observation:
- A 30-year-old male with FD presented with TIA-like symptoms; MRI revealed Chiari type I malformation (CMI) instead of cerebrovascular disease.
- Head MRI screening in 44 males and 7 females with FD identified 3 additional CMI cases (2 males, 1 female).
Findings:
- The study identified a potential association between Fabry disease and Chiari type I malformation.
- Four cases of CMI were found in a cohort of 51 FD patients.
Implications:
- Further research is needed to determine if the association between FD and CMI is coincidental or causal.
- Clinical recommendation: consider screening for CMI in all patients diagnosed with Fabry disease.
Abstract:
Fabry disease (FD) is an X-linked inborn error of metabolism resulting from the deficient activity of alpha-galactosidase A which leads to the widespread deposition of glycosphingolipids in lysosomes, and to ischemic complications involving kidneys, heart and brain. Among neurological symptoms, strokes and transient ischemic attacks (TIA) have been reported. A 30-year-old male patient, with FD, was referred to us for evaluation of a sudden episode of dizziness, with disequilibrium, and diplopia, in agreement with the diagnosis of a TIA. Head magnetic resonance imaging (MRI) showed no cerebrovascular involvement but revealed the presence of Chiari type I malformation (CMI). We subsequently performed head MRI in a cohort of 44 consecutive hemizygous male patients and seven heterozygous females affected with FD, and identified three additional cases (two males and one female) of CMI. Whether the association is coincidental or not will need further studies but our data suggest that CMI should be ruled out in all Fabry patients.
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