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IntroductionBrown tumors are rare focal giant-cell lesions that arise as a direct result of the effect of parathyroid hormone on bone tissue in some patients with hyperparathyroidism. Brown tumors can affect the mandible, maxilla, clavicle, ribs, and pelvic bones. Therefore, diagnosis requires a systemic investigation for lesion differentiation.Case presentationWe present a 42-year-old Greek woman, with a rare case of brown tumor of the maxillary sinus due to primary hyperparathyroidism. Primary hyperparathyroidism is caused by a solitary adenoma in 80% of cases and by glandular hyperplasia in 20%.ConclusionsDifferential diagnosis is important for the right treatment choice. It should exclude other giant cell lesions that affect the maxillae.

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Obviously, there is a link between CRS with NP and asthma. The data analysis of our study supports the hypothesis that FESS could have beneficial effect on both diseases improving objective and subjective measurements.

NIPF and AR were proven to be promising methods for objective evaluation and monitoring of nasal obstruction based on different aspects of nasal physiology in patients with CRS.

An ODI3 ≥3.5 episodes per hour in nocturnal oximetry is related to increased resolution rate of nocturnal hypoxemia after T/A for SDB compared with no intervention.

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