Jun 18, 2019 · sinusitis that lasts more than three weeks or recurs more than three times a year is called chronic sinusitis. the most common cause of chronic sinusitis is inadequately treated acute sinusitis, and since the penaksiran and treatment of acute sinusitis have improved so much, chronic sinusitis is less common than it used to be. Symptoms and treatments of sinusitis. Radiology resident, hospital clínico universidad de chile. dua. neuroradiologist key words: cranial sinuses; sinusitis chile u sinus thrombosis, intracranial; tomography,. Maxillary Sinusitis Caused Byactinomucor Elegans Journal Of When sinus infections become sinusitis. you know the feeling: runny nose, sinusitis chile u headache, sinus congestion. is it just a cold? or something more serious?. Viral infections common cold is mostly cause of sinusitis. bacterial infections infection in upper respiratory tract persists long for 10 or more days then it is more likely to be caused by bacterial infections. fung...