case_images: PMC9525990_01
case_images: Facial mass computed tomodensitometry with axial cut (
  a,
  c) and coronal cut (
  b,
  d). (
  a,
  b): Allergic fungal rhinosinusitis: heterogeneous opacity of the nasal cavity and ethmoido-maxillary cavities (red star) and thinning of the bony walls (red arrow). (
  b,
  d): Fungal ball: opacity of the right maxillary sinus with local calcification in maxillary sinus (blue arrow).
case_images: f1000research-10-136141-g0000.jpg
case_images: PMC9525990_01_f1000research-10-136141-g0000.jpg
case_images: f1
case_images: The other radiological signs were heterogeneous opacities within the sinus cavity (N=5; 45.5%), local calcifications (N=4; 36.4%) and thinning of the bony walls of the sinuses (N=4; 36.4%) ( Figure 1).
case_images: MRI of the facial mass of a patient with allergic fungal rhinosinusitis: axial cut (
  a,
  b) and coronal cut (
  c). The filling of the left maxillary sinus is presented in isosignal T1 (
  a) and in hyposignal T2 or signal void (red arrow) (
  b,
  c).
case_images: f1000research-10-136141-g0001.jpg
case_images: PMC9525990_01_f1000research-10-136141-g0001.jpg
case_images: f2
case_images: In all cases, it showed T2 hypointense (signal void) images suggestive of the mycotic origin ( Figure 2).
case_images: Intraoperative endoscopic view of a case of allergic fungal rhinosinusitis: mucin (blue arrow) within ethmoidal cells (
  a) and of the left maxillary sinus (
  b).
case_images: f1000research-10-136141-g0002.jpg
case_images: PMC9525990_01_f1000research-10-136141-g0002.jpg
case_images: f3
case_images: Details of the surgical procedures and perioperative findings are presented in Table 1, Figure 3 and Figure 4.
case_images: Intraoperative view of a case of fungal ball:
  a: fungal ball taken from the left maxillary sinus.
  b: fungal ball specimen.
case_images: f1000research-10-136141-g0003.jpg
case_images: PMC9525990_01_f1000research-10-136141-g0003.jpg
case_images: f4
case_images: Details of the surgical procedures and perioperative findings are presented in Table 1, Figure 3 and Figure 4.