Griscelli syndrome type 2: a novel mutation in RAB27A gene with different clinical features in 2 siblings: a diagnostic conundrum / 소아과
Korean Journal of Pediatrics
; : 91-95, 2014.
Article
en En
| WPRIM
| ID: wpr-128041
Biblioteca responsable:
WPRO
ABSTRACT
Griscelli syndrome type 2 (GS2) is a rare autosomal recessive disease caused by mutations in the RAB27A gene. It is characterized by cutaneous hypopigmentation, immunodeficiency, and hemophagocytic lymphohistiocytosis. We describe 2 brothers who had GS2 with clinically diverse manifestations. The elder brother presented with a purely neurological picture, whereas the younger one presented with fever, pancytopenia, hepatosplenomegaly, and erythema nodosum. Considering that cutaneous hypopigmentation was a common feature between the brothers, genetic analysis for Griscelli syndrome was performed. As the elder sibling had died, mutation analysis was only performed on the younger sibling, which revealed a novel homozygous mutation in the RAB27A gene on chromosome 15 showing a single-base substitution (c.136T>A p.F46I). Both parents were heterozygous for the same mutation. This confirmed the diagnosis of GS2 in the accelerated phase in both siblings. The atypical features of GS2 in these cases are a novel mutation, isolated neurological involvement in one sibling, association with erythema nodosum, and 2 distinct clinical presentations in siblings with the same genetic mutation.
Palabras clave
Texto completo:
1
Índice:
WPRIM
Asunto principal:
Pancitopenia
/
Padres
/
Cromosomas Humanos Par 15
/
Hipopigmentación
/
Hermanos
/
Diagnóstico
/
Eritema Nudoso
/
Linfohistiocitosis Hemofagocítica
/
Fiebre
/
Enfermedades del Sistema Nervioso
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
Korean Journal of Pediatrics
Año:
2014
Tipo del documento:
Article