Imageology study of the relationship between supratubal recess and the course of cholesteatoma

Objective To investigate the relation between the morphological changes of supratubal recess and the course of cholesteatoma.Methods Using high resolution CT to measure the supratubal recess of the cholesteatoma ears.Results the size of the supratubal recess showed no significant difference during cholesteatoma ears with different courses(P 0.05),there was no relationship between the size of the supratubal recess and the course of cholesteatoma.Conclusion The supratubal recess of the cholesteatoma is smaller than the normal ears.It happened before the development of cholesteatoma.The morphological changes of supratubal recess may affect the formation of cholesteatoma.The enlargement of supratubal recess during the operation of canal wall up technique may cut down recurrence rate of cholesteatoma.