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ORIGINAL ARTICLE
Year : 2016  |  Volume : 13  |  Issue : 2  |  Page : 67-70

Hearing impairment in children with permanent congenital hypothyroidism: Data from Northwest India


1 Department of Pediatrics, Advanced Pediatric Center, Pediatric Endocrinology and Diabetes Unit, Post Graduate Institute of Medical Education and Research, Chandigarh, India
2 Department of Pediatrics, Pediatric Endocrinology and Diabetes Unit, Post Graduate Institute of Medical Education and Research, Chandigarh, India
3 Department of Otolaryngology and Head and Neck Surgery, Post Graduate Institute of Medical Education and Research, Chandigarh, India
4 Department of Pediatrics, Post Graduate Institute of Medical Education and Research, Chandigarh, India

Correspondence Address:
Dr. Devi Dayal
Department of Pediatrics, Pediatric Endocrinology and Diabetes Unit, Advanced Pediatric Center, Post Graduate Institute of Medical Education and Research, Chandigarh - 160 012
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0973-0354.183278

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Background: There is an increased risk of hearing impairment in permanent congenital hypothyroidism (CH). Only a few studies have explored the prevalence of hearing impairment in CH and their results vary widely. There is no data on hearing impairment in Indian children with CH. Setting and Design: Pediatric Endocrinology Clinic of a large tertiary care hospital located in Northwest India. Cross sectional study. Materials and Methods: Hearing evaluation of 77 children diagnosed with permanent CH was performed with a battery of tools that included Middle ear analysis, Pure Tone Audiometry (PTA), Behavioral Observation Audiometry (BOA) and Oto Acoustic Emissions (OAE). The choice of assessment tool was based on patient's age. Results: The mean age at diagnosis and at inclusion into the study was 3.0±2.7 years and 5.2±3.3 years respectively. The majority (63, 82%) of patients had symptoms suggestive of hypothyroidism; none complained of hearing loss. The etiological diagnosis was thyroid agenesis in 55 (71.4%), ectopia in 5 (6.5%), dyshormonogenesis in 9 (11.7%) and hypothyroidism with eutopic gland in 8 (10.3%) patients. Middle ear analysis, PTA, BOA and OAE was done in 48, 44, 43 and 53 patients respectively. Sensorineural hearing loss was detected in 1 out of 77 (1.2%) patients while conductive hearing loss was found in 5 (6.5%) patients. Conclusion: Hearing loss was present in a small proportion of patients with permanent CH. Further larger studies are required to determine the exact prevalence of hearing impairment in Indian children with permanent CH.


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