INFLUENCE OF EUSTACHIAN TUBE ANGLE IN THE DEVELOPMENT OF CSOM AND CHOLESTEATOMA
Objectives: To determine the relationship between Eustachian tube angle and development of CSOM and Cholesteatoma
Methods: This is a retrospective study. A total of 79 patients who were referred for HRCT temporal bone with CSOM and Cholesteatoma from June 2016 to June 2018 were included. This includes 50 adults (27 males, 23 females) and 29 pediatrics (20 Males, 9 Females). The age for adults and pediatrics ranges from 18 and above, 0-18 respectively. Of 50 adults 25 are with CSOM (10 Right, 9 Left, 6 Bilateral) and 25 are with cholesteatoma (13 Right, 12 Left, 0 Bilateral). Of 29 pediatrics, 15 are with CSOM (4 Right, 3 left, 8 Bilateral) and 14 are with cholesteatomaÂ (7 Right, 7 Left, 0 Bilateral). Patients who underwent CT scan for PNS with no pathologies related to middle ear were included as controls (49 adults, 30 pediatrics). The ET angle with respect to Reidâ€™s plane in patient with CSOM and with cholesteatoma in pediatrics and adults. Mann-Whitney was done to compare the ET angle between three groups.
Results: The mean and standard deviation of ET angle measured for total patients in normal group, CSOM group and cholesteatoma group was 26.20Â±2.0, 24.30Â±1.6, 22.18Â±1.4 respectively. There was significant difference (p<0.01) in ET angle among three groups.
Conclusion: The ET angle may be predisposing factor in the development of CSOM and Cholesteatoma.
Keywords: Eustachian tube angle, CSOM, HRCT temporal bone, Cholesteatoma.
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