Identification of a novel homozygous ALX4 mutation in two unrelated patients with frontonasal dysplasia type-2.
Am J Med Genet A
; 176(5): 1190-1194, 2018 05.
Article
en En
| MEDLINE
| ID: mdl-29681084
ABSTRACT
We report two unrelated boys with frontonasal dysplasias type-2 (FND-2) who shared an identical novel homozygous ALX4 mutation c.291delG (p.Q98Sfs*83). Both patients presented with a large skull defect but one had bilateral parietal meningocele-like cysts that lie along with the bony defect and increased in size with age. Scalp alopecia, hypertelorism, and clefted alae nasi were also detected in both of them. Furthermore, impalpable gonads were noted, being unilateral in one and bilateral in the other. Neuroimaging showed small dysplastic occipital lobes with dysgyria and midline subarachnoid cyst. Additional dysplastic corpus callosum and small cerebellar vermis were observed in one patient. Parietal foramina were noted in the parents of one patient. Our findings highlight the dosage effect of ALX4 and underscore the challenges of prenatal genetic counseling. Further, the indirect role of ALX4 in the development of the occipital lobe and posterior fossa is discussed.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Fenotipo
/
Factores de Transcripción
/
Anomalías Craneofaciales
/
Proteínas de Unión al ADN
/
Cara
/
Homocigoto
/
Mutación
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Child, preschool
/
Humans
/
Infant
/
Male
Idioma:
En
Revista:
Am J Med Genet A
Asunto de la revista:
GENETICA MEDICA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Egipto