OBJECTIVE To analyse the result of mastoid abnormal MRI singals in infants without clinical symptoms and to evaluate the diagnostic value. METHODS The MRI data of abnormal signals in the middle ear and mastoid of 42 infants(62 ears) were analyzed with 1000 Hz probe tone tympanometry and oto-endoscope. RESULTS Of the infants with abnormal MRI signals of the middle ear and mastoid, 50 ears were secretory otitis media(80.7％), 10 ears had dysfunction of middle ear (16.1％), and 2 ears were not identified. CONCLUSION In the infant who had a abnormal long T2 singals MRI but without clinical symptoms, 80.7％ were caused by SOM or AOM. It is valuable for clinical efficacy evaluation and treatment planning in advance.
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