Isolated fungus ball in a single cell of the left ethmoid roof: A case report

Figure 1 Computed tomography, histopathology, and nasal endoscopic images of the case. A-C: Computed tomography (CT) scan of the nose and paranasal sinuses showed a soft-tissue density with a round surface (arrow) in the left ethmoid roof cell (axial, coronal, and sagittal CT scans); D: Histopathological image reveals fungal hyphae (arrow) (hematoxylin and eosin staining 400 ×); E: A small, dark-brownish mass wass observed in the left ethmoid sinus using a “0” nasal endoscope; F: After functional endoscopic sinus surgery, the mass was removed. NS: Nasal septum; ST: Superior turbinate.