en Radiology Radiology case report case report <span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="line-height:14pt"><span new="" roman="" times=""><b><i><span style="color:blue">Background</span></i></b><i><span style="color:blue">:</span></i> Fungal infections of the paranasal sinus are increasingly recognized in both normal and immunocompromised individuals. It is necessary to distinguish invasive diseases from the non- invasive as the result and prognosis of sinus treatment different in each one. CBCT imaging could help us in this regard. In this case, we describe a fungal sinusitis according to Cone Beam Computed Tomography (CBCT) findings.<span style="color:black"></span></span></span><br> <span style="line-height:14pt"><span new="" roman="" times=""><b><i><span style="color:blue">Case presentation:</span></i></b> We present a case of a 48-year-old woman with diabetes mellitus referred to our Maxillofacial Radiology Center in Babol, Iran. The patient has been discharged from the hospital recently after recovering from COVID-19 Considering the background systemic disease (diabetes) and clinical and radiological findings (extension of bone destruction), fungal sinusitis (invasive form) was listed top in the differential diagnosis list , as it is the most common condition in post-COVID-19 patients.<span style="color:black"></span></span></span><br> <span style="line-height:14pt"><span new="" roman="" times=""><b><i><span style="color:blue">Conclusion:</span></i></b><b> </b>CBCT images are very useful for diagnosing normal anatomy variations and sinus lesions especially bone lesions .In this case, its early diagnosis led to rapid recovery of the patient.</span></span></span></span><span style="font-size:12pt"><span style="line-height:14pt"><span new="" roman="" style="font-family:" times=""><span style="font-size:10.0pt"><span style="color:black"></span></span></span></span></span> CBCT, corona virus, maxillary sinus 307 310 http://caspjim.com/browse.php?a_code=A-10-2530-3&slc_lang=en&sid=1 Farida Abesi faridaabesi@yahoo.fr 100319475328460035708 100319475328460035708 No Deprtment of Oral and Maxillofacial Radiology, Dental School, Babol University of Medical Sciences, Babol, Iran Mona Alimohammadi mona_y28@yahoo.com 100319475328460035709 100319475328460035709 Yes Department of Oral and Maxillofacial Radiology, Dental School, Mazandaran University of Medical Sciences, Sari, Iran