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Absent paranasal sinuses
- ... palate), absence of the sinuses behind the nose (paranasal sinuses), blockage of the nasal passages (choanal atresia), narrowing ...
- Chronic Bronchitis/Reference Desk ... Chronic Bronchitis ... Acute Bronchitis/Reference Desk ... Acute Bronchitis ... Bronchial Disorders/Reference Desk ... Bronchial Disorders
(National Cancer Institute) 