Accelerated phase of Chediak-Higashi syndrome.

A 18-month-old girl with a diagnosis of Chediak-Higashi syndrome (CHS) presented with severe bacterial skin infection. Recurrent episodes of bacterial infections began at the age of 2 months. On physical examination, generalized lymphadenopathy, hepatosplenomegaly, skin hypopigmentation, and silvery hair were noted. Bone marrow aspirate revealed prominent granules (top left and right) within the lymphocytes and myeloid cells. Phagocytosis of red cells and red-cell precursors (arrows) is also seen. A diagnosis of “accelerated phase” of CHS was made. She underwent an unrelated allogeneic hematopoietic stem cell transplantation. Three years later she is well and attending school.