SciELO - Scientific Electronic Library Online

 
vol.73 número3Tumor maligno de la vaina del nervio periférico retroperitoneal en un niño preescolar índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • No hay artículos similaresSimilares en SciELO

Compartir


Boletín médico del Hospital Infantil de México

versión impresa ISSN 1665-1146

Resumen

ESMER, Carmen; VILLEGAS-AGUILERA, Miguel; MORALES-IBARRA, Juan José  y  BRAVO-ORO, Antonio. An atypical presentation of Infantile Alexander disease lacking macrocephaly. Bol. Med. Hosp. Infant. Mex. [online]. 2016, vol.73, n.3, pp.196-201. ISSN 1665-1146.  http://dx.doi.org/10.1016/j.bmhimx.2016.02.005.

Background:

Alexander disease is a rare form of leukodystrophy that involves mainly astrocytes; it is inherited in an autosomal recessive manner and occurs by mutations in the GFAP gene, located on chromosome 17q21. It can occur at any age and its infantile form is characterized by macrocephaly, seizures, severe motor and cognitive delay, and progressive spasticity or ataxia.

Case report:

An 8-month-old female was evaluated with a history of neurodevelopmental delay and unprovoked focal motor seizures. Physical examination showed normal head circumference, increased motor responses to tactile and noise stimuli, pyramidal signs and no visceromegalies. Widespread hypodense white matter was found on magnetic resonance and lumbar puncture showed hyperproteinorrachia. Krabbe disease was ruled out by enzymatic assay and gene sequencing of GALC. In the reassessment of the case, abnormalities in neuroimaging lead to suspicion of Alexander disease, and GFAP gene sequencing reported a pathogenic mutation in exon 4 c.716G > A, which caused a change of arginine to histidine at position 239 of the protein (p.Arg239His).

Conclusions:

The radiographic signs observed in the resonance were decisive for the diagnosis, later confirmed by molecular study. It is important to consider that certain mutations are not associated with macrocephaly, which may cause delay in diagnosis.

Palabras llave : Neurodegenerative disorder; Leucodystrophy; Alexander disease; Magnetic resonance; GFAP gene.

        · resumen en Español     · texto en Español     · Español ( pdf )