Silvery hair syndrome in two cousins: Chediak-Higashi syndrome vs Griscelli syndrome, with rare associations.

Silvery hair is a rare clinical manifestation which is a common presentation in a group of rare syndromes which usually present in the pediatric age group together termed as "silvery hair syndrome," consisting of Chediak-Higashi syndrome (CHS), Griscelli syndrome (GS), and Elejalde disease. CHS is a rare autosomal recessive disorder. It is characterized by mild pigment dilution (partial oculocutaneous albinism), silvery blond hair, severe phagocytic immunodeficiency, bleeding tendencies, recurrent pyogenic infections, progressive sensory or motor neurological defects. GS is also a rare autosomal recessive disorder characterized by reduced skin pigmentation, often regarded as partial albinism and silvery grey hair combined with immunodeficiency. To make correct diagnosis and to differentiate between CHS and GS, it requires light microscopic examination of skin and hair shafts, immunological and peripheral blood smear evaluation. They have been reported to be associated with some common clinical association as a part of the syndrome due to pigmentary delusion, neurological dysfunction, and severe life-threatening infections due to neutrophil phagocytosis dysfunction. There are reports of few rare associations and varied presentations and variable mean survival age. We report two cases with common presentation of silvery hair but varied systemic and clinical manifestations and survival in two cousin brothers from the same family.