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.

Objective:To explore and analyze the clinical characteristics, diagnosis and treatment of infant hairy polyp.Methods:A retrospective analysis was made on 13 cases of hairy polyp confirmed by pathology, who were admitted to the Children′s Hospital of Hebei Province from January 2010 to September 2019, including 4 males and 9 females, with a male-female ratio of 1∶2.25. The age ranged from 3 hours to 1 year, and the median age was 1 month. Twelve of the 13 children were found to have difficulty breathing or feeding. All the children received coblation resection under general anesthesia. The root pedicle of the mass was found in the lateral nasopharyngeal wall in 8 cases, in the junction of palatine and palatopharyngeal arch of tonsil and the tongue and esophageal entrance in 1 case, respectively. Nasal septum was found in 2 cases, including 1 case located between two incisors. The wound at the root pedicle was ablated and the bleeding was stopped completely.Results:Postoperative follow-up lasted from 3 months to 2 years, and there was no recurrence in 12 cases. Fibrolaryngoscope showed a mass of the right eustachian tube and pharyngeal mouth in 1 case 2 years after the surgery, which was considered recurrence of hairy polyps and lost after that.Conclusion:Hairy polyps in infants is a rare clinical disease, and its main symptom is upper respiratory tract obstruction. Early diagnosis and radical surgery are the key to the treatment of the disease.