Objectives: To study the nasal mucosal changes in cases with choanal atresia at the light and electron microscope and to compare the results with the normal side in unilateral cases.
Study Design: Cross sectional study.
Setting: Tertiary University hospital, departments of Otolaryngology and pathology.
Methods: Sixteen patients diagnosed to have choanal atresia (seven bilateral and nine unilateral); ranging in age from 3 days to 9 years; were included in this study. During surgical repair, a biopsy of the inferior turbinate mucosa was taken. Biopsy from patent side in unilateral choanal atresia was also taken (as a control). Then biopsies were subjected to histopathological, histochemical, immunohistochemical and ultrastructure studies.
Results: The nasal mucosa in choanal atresia side (weather unilateral or bilateral) showed distorted cilia, marked increase of mucous submucosal glands associated with marked reduction of goblet cell density and lymphocytic cellular infiltration. The patent side (control) showed normal respiratory epithelium with obviously noted intra-epithelial goblet cells. Submucosal glands were less in number and activity than in the atretic side.
Conclusions: Choanal atresia showed a condition of the nasal mucous membrane with characteristic excessive nasal tenacious secretion; mostly actively secreted besides some effect of lack of drainage due to interrupted cilia. Further studies are required to evaluate the impact of atresia repair on detected features.
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