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학습 자료 둘러보기 →Suspect mastoiditis in a child with recent or concurrent acute otitis media who develops a protruding auricle and the classic triad: postauricular tenderness, erythema, and edema over the mastoid bone.
The infection spreads from the middle ear to the mastoid air cells, causing pus accumulation under pressure. This leads to localized periostitis and soft tissue inflammation, making palpation of the mastoid process exquisitely painful.
Do not confuse with uncomplicated AOM, where the mastoid area is non-tender. Clear, sweet-smelling otorrhea suggests a CSF leak, not mastoiditis. Bilateral symptoms and vertigo point to other diagnoses.
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