Data for acute invasive rhinosinusitis was obtained from the Otorhinolaryngology departments at our tertiary hospital at the period from January 2017 to December 2020. Then the risk factors of comorbid diseases and fungal types between post-Covid-19 and non-Covid-19 groups regarding the incidence of invasive rhinosinusitis are compared.

Inclusion Criteria:

• Patients of any age and sex. invasive rhinosinusoitis diagnosis based on clinical , endoscopic diagnosis
• Positive findings for acute sinusitis on sinus computed tomography (CT) scan in addition to fungal determination by histopathological examination of specimen of affected tissues for detection of the type of fungi.
• Positive PCR was confirmed from the patient's files at the isolation hospitals for COVID 19 group.

Exclusion Criteria:

• Patients who completed management outside our hospital

Patients of any age and sex medically managed in AlAzhar Hospitals in Egypt for invasive rhinosinusoitis

publication in medical journal