Chronic rhinofacial basidiobolomycosis caused by Basidiobolus ranarum: Report of a case from Aseer Region, Kingdom of Saudi Arabia.

We present a case of fungal sinusitis caused by Basidiobolus ranarum in a 22-year-old male patient with chronic rhinosinusitis in Aseer region, Kingdom of Saudi Arabia. The patient was admitted with nasal obstruction accompanied by itching, sneezing, rhinorrhea, epistaxis and recurrent headache. Axial computed tomography (CT) scan of the paranasal sinuses showed a clear left facial swelling chronic inflammation and granulomata. Basidiobolus ranarum fungus was isolated on Sabouraud dextrose agar from a biopsy specimen. The organism was characterized by flat, yellowish-grey, glabrous, becoming radially folded fungus that under the microscope showed broad vegetative hyaline hyphae that bear zygospores with protuberances. The patient made good recovery and was discharged home with no recurrences after receiving oral itraconazole and removal of the polyps surgically.