Clinical and imaging findings in 12 patients with sinonasal schwannoma

Patient/Age(yr)/SexChief SymptomCT/MR ImageLocationSize (mm)Shape/Bone ErosionCTMR ImagingCystic or Hemorrhagic Degeneration
AttenuationaEnhancementbT1-Weighted ImageaT2-Weighted ImageaEnhancementb
1/46/FNasal obstruction for 2 moYes/yesLt. NC + ES52Tubular, expansile/yesIsodenseMild, patchyIsointenseIsointenseMarkedYes
2/27/MAnterior cheek pain for 3 moYes/yesLt. MS29Round, expansile/yesIsodenseIsointenseIsointenseMarkedNo
3/24/FExophthalmos for 1 moYes/yesLt. MS45Lobulated, expansile/yesIsodenseMild, patchyIsointenseIsointenseMarkedYes
4/14/MRhinorrhea for 2 moYes/noSeptum14Round, nonexpansile/noIsodenseMild, patchyNo
5/22/MNasal obstruction for 6 moYes/yesLt. NC55Tubular, expansile/yesIsodenseMild, patchyHypointenseHyperintenseMarkedNo
6/51/MNasal obstruction for 9 moYes/noLt. NC50Tubular, nonexpansile/noIsodenseMild, patchyNo
7/42/FNasal obstruction for 6 moYes/yesRt. NC + ES45Lobulated, expansile/yesIsodenseMarkedHypointenseIsointenseMarkedNo
8/33/MNasal obstruction for 4 moYes/yesRt. NC + ES30Tubular, nonexpansile/noIsodenseMildIsointenseIsointenseMarkedNo
9/33/FNasal obstruction for 3 moYes/yesRt. NC + ES35Tubular, expansile/yesIsodenseMildIsointenseIsointenseMarkedNo
10/79/MRhinorrhea for 2 yrYes/yesLt. septum15Round, nonexpansile/noIsodenseMild, patchyIsointenseIsointenseMarkedNo
11/45/MEpistaxis for 2 moYes/noRt. septum5Round, nonexpansile/noIsodenseNo
12/30/FHeadache for 1 moYes/yesLt. NC + ES45Lobulated, expansile/yesIsodenseIsointenseIsointenseMarkedNo

  • Note:—ES indicates ethmoid sinus; NC, nasal cavity; MS, maxillary sinus; Rt., right; Lt., left.

  • ↵a Compared with the attenuation and signal intensity of the brain stem.

  • ↵b Compared with the enhancement of the masseter muscle.