OBJECTIVE To explore the epidemiological characteristics,symptoms and CT features of fungal ball sinusitis.METHODS A retrospective analysis was conducted on the clinical data of 182 patients with pathologically confirmed fungal ball sinusitis,in which demographic characteristics,sinus involvement,and imaging manifestations were analyzed.RESULTS Unilateral maxillary sinus involvement was predominant(144 cases,79.1%).Head and facial pain(83 cases,45.6%)was the most common clinical symptom.In terms of CT imaging,the total incidence rate of calcification and bone hyperplasia is 93.4%(170/182);There was no statistically significant difference in the occurrence of bone hyperplasia between different sinuses caused by fungal infections(P>0.05).The probability of fungal maxillary sinusitis and fungal sphenoid sinusitis affecting the nasal septum is the same(P>0.05).The presence or absence of high-density shadows in CT imaging does not increase the probability of pathological detection of Aspergillus(P>0.05).CONCLUSION The probability of bone hyperplasia and accumulation of nasal septum bone in different sinuses infected with fungal balls is the same.