Published online Jul 26, 2021. doi: 10.12998/wjcc.v9.i21.6005
Peer-review started: January 26, 2021
First decision: April 29, 2021
Revised: May 7, 2021
Accepted: June 3, 2021
Article in press: June 3, 2021
Published online: July 26, 2021
Isolated fungus ball (FB) in a single cell of the left ethmoid roof is a very rare condition.
We report the case of a 51-year-old female patient whose computed tomography presented a soft tissue mass filling in the left ethmoid roof cell. The patient did not complain of any specific sinonasal symptoms, such as nasal discharge, nasal obstruction, and loss of smell, apart from headache in the left retro-orbital region.
The patient underwent functional endoscopic sinus surgery under general anesthesia, and the inflammatory material collected was histologically diagnosed as a rare case of a FB in a single cell of the left ethmoid roof.
Core Tip: In this case, preoperative computed tomography did not lead to the correct diagnosis, which showed a round soft tissue mass in the left ethmoid sinus without any calcification. Functional endoscopic sinus surgery in the patient revealed cheesy, clay-like material that was highly suggestive of a fungus ball (FB). The histological investigation confirmed the accurate diagnosis; however, negative results were obtained from FB cultures.