Article Figures & Data
Figures
- Fig. 1.
Case 10. Schwannoma of the nasal cavity in a 79-year-old man. A, Precontrast axial CT scan with a bone algorithm shows a polypoid mass in the left anterior nasal cavity, originating from the nasal septum. B, Contrast-enhanced axial CT scan with a soft-tissue algorithm shows mild and patchy enhancement of the mass. C, Fat-suppressed axial T2-weighted MR image shows that the mass is isointense to the brain stem. D, Contrast-enhanced fat-suppressed sagittal T1-weighted MR image shows marked contrast enhancement within the mass.
- Fig. 2.
Case 5. Schwannoma of the nasal cavity in a 22-year-old man. A, Contrast-enhanced coronal CT image shows a tubular expansile soft-tissue mass in the left nasal cavity, demonstrating mild enhancement. B, Axial T1-weighted MR image shows the tumor extending in the anteroposterior dimension and remodeling the lateral nasal wall. C, Fat-suppressed axial T2-weighted MR image shows that the tumor is hyperintense to the brain stem. D, Contrast-enhanced fat-suppressed axial T1-weighted MR images show marked homogeneous enhancement within the tumor.
- Fig. 3.
Case 7. Schwannoma of the nasal cavity and ethmoid sinus in a 42-year-old woman. A, Precontrast axial CT scan shows a large lobulated expansile mass isoattenuating to the brain stem and centered in the right posterior ethmoid sinus. B, Postcontrast axial CT scan shows marked enhancement of the mass, greater than that of the muscles in the masticator space. The mass extends to the ipsilateral orbit and maxillary and sphenoid sinuses with scalloping and remodeling of the bony walls of the nasal septum, maxilla, and sphenoid bone. C, Coronal T2-weighted MR image shows heterogeneous signal intensity of the mass and signal voids within the lesion, suggestive of prominent vascularity. D, Contrast-enhanced fat-suppressed coronal T1-weighted MR image shows marked and heterogeneous enhancement of the mass.
- Fig. 4.
Case 3. Schwannoma of the maxillary sinus in a 24-year-old woman. A and B, Precontrast axial and coronal CT scan with a bone algorithm shows a lobulated expansile mass arising from the left infraorbital canal, which replaces the left maxillary sinus. Note cortical thinning and remodeling of the orbital floor and the medial and posterior maxillary sinus walls by the mass. C, Fat-suppressed axial T2-weighted MR image shows multiple fluid-fluid levels within the lesion, which are suggestive of intratumoral hemorrhage. D, Contrast-enhanced fat-suppressed coronal T1-weighted MR image shows cystic change at the lower part of the mass and marked enhancement in the upper solid part of the mass.
Tables
Clinical and imaging findings in 12 patients with sinonasal schwannoma
Patient/Age(yr)/Sex Chief Symptom CT/MR Image Location Size (mm) Shape/Bone Erosion CT MR Imaging Cystic or Hemorrhagic Degeneration Attenuationa Enhancementb T1-Weighted Imagea T2-Weighted Imagea Enhancementb 1/46/F Nasal obstruction for 2 mo Yes/yes Lt. NC + ES 52 Tubular, expansile/yes Isodense Mild, patchy Isointense Isointense Marked Yes 2/27/M Anterior cheek pain for 3 mo Yes/yes Lt. MS 29 Round, expansile/yes Isodense Isointense Isointense Marked No 3/24/F Exophthalmos for 1 mo Yes/yes Lt. MS 45 Lobulated, expansile/yes Isodense Mild, patchy Isointense Isointense Marked Yes 4/14/M Rhinorrhea for 2 mo Yes/no Septum 14 Round, nonexpansile/no Isodense Mild, patchy No 5/22/M Nasal obstruction for 6 mo Yes/yes Lt. NC 55 Tubular, expansile/yes Isodense Mild, patchy Hypointense Hyperintense Marked No 6/51/M Nasal obstruction for 9 mo Yes/no Lt. NC 50 Tubular, nonexpansile/no Isodense Mild, patchy No 7/42/F Nasal obstruction for 6 mo Yes/yes Rt. NC + ES 45 Lobulated, expansile/yes Isodense Marked Hypointense Isointense Marked No 8/33/M Nasal obstruction for 4 mo Yes/yes Rt. NC + ES 30 Tubular, nonexpansile/no Isodense Mild Isointense Isointense Marked No 9/33/F Nasal obstruction for 3 mo Yes/yes Rt. NC + ES 35 Tubular, expansile/yes Isodense Mild Isointense Isointense Marked No 10/79/M Rhinorrhea for 2 yr Yes/yes Lt. septum 15 Round, nonexpansile/no Isodense Mild, patchy Isointense Isointense Marked No 11/45/M Epistaxis for 2 mo Yes/no Rt. septum 5 Round, nonexpansile/no Isodense No 12/30/F Headache for 1 mo Yes/yes Lt. NC + ES 45 Lobulated, expansile/yes Isodense Isointense Isointense Marked No
