title: [Blue eardrum and black mastoid (author's transl)].
mesh_terms: D002675:Child, Preschool; D002784:Cholesterol / Q000032:analysis*; D002908:Chronic Disease; D006801:Humans; D008297:Male; D008416:Mastoid / Q000032:analysis / Q000473:pathology*; D008417:Mastoiditis / Q000378:metabolism / Q000473:pathology*; D010033:Otitis Media / Q000473:pathology*; D010034:Otitis Media with Effusion / Q000378:metabolism / Q000473:pathology*; D014432:Tympanic Membrane / Q000032:analysis / Q000473:pathology*
chemical_list: D002784:Cholesterol