title: A 4-month-old boy being evaluated for splenomegaly and pancytopenia.
authors: Robert
authors: R
authors: Listernick
mesh_terms: D006801:Humans; D007223:Infant; D051359:Lymphohistiocytosis, Hemophagocytic / Q000175:diagnosis*; D008297:Male; D010198:Pancytopenia / Q000209:etiology*; D013163:Splenomegaly / Q000209:etiology*