[Acute infectious lymphocytosis].
D002675:Child, Preschool; D006529:Hepatomegaly / Q000209:etiology*; D006801:Humans; D008218:Lymphocytosis / Q000150:complications* / Q000175:diagnosis; D008297:Male; D011014:Pneumonia / Q000209:etiology*
Lymphocytosis infectiosa acuta.