Article Figures & Data
Figures
- Fig. 1.
Axial image at the level of the mastoid tip of a healthy control demonstrating the parotid segmentation analysis. This quantitative analysis was performed assessing the parotid gland size to obtain a measure of the area in square centimeters for both sides.
- Fig. 2.
Axial T1WI through the skull base demonstrating left trigeminal nerve denervation and atrophy of the ipsilateral left masticator group of muscles. Note that the left parotid gland is markedly atrophic. The right masticator group of muscles and right parotid gland are unremarkable.
- Fig. 3.
Axial T1WI in another patient with a left petroclival meningioma demonstrates imaging findings consistent with left trigeminal nerve denervation. Note the atrophy of the ipsilateral parotid gland.
- Fig. 4.
Axial T1WI in a patient with right trigeminal schwannoma. Note the atrophy of the right masticator group of muscles, consistent with trigeminal nerve denervation and atrophy of the ipsilateral parotid gland.
Tables
Disease Sex Age (yr) Atrophy Parotid Side Nasopharyngeal tumor, perineural spread M 32 Yes Left Melanoma cheek, perineural spread M 41 Yes Left Trigeminal nerve schwannoma F 46 Yes Left Idiopathic M 55 Yes Right Metastatic cancer in masticator space F 29 Yes Right Trigeminal nerve schwannoma M 38 Yes Left Trigeminal nerve schwannoma F 42 Yes Right Trauma M 51 Yes Right Meningioma F 59 Yes Left Idiopathic F 47 Yes Left Idiopathic M 29 Yes Right Trauma M 26 No Left Nasopharyngeal tumor, perineural spread M 45 No Left Trigeminal nerve schwannoma F 38 No Left Idiopathic M 29 No Right Trigeminal nerve schwannoma F 38 No Right Trauma M 53 No Left Idiopathic M 54 No Left Meningioma M 64 No Right Meningioma F 47 No Left Trigeminal nerve schwannoma M 32 No Right Nasopharyngeal tumor, perineural spread F 43 No Left Meningioma M 64 No Left Idiopathic F 65 No Right Idiopathic M 54 No Left Meningioma F 24 No Left D ND Total PA 9 3 12 NP 17 75 92 Total 26 78 104 Note:—D indicates trigeminal denervation; ND, nontrigeminal denervation; PA, parotid atrophy; NP, normal parotid.
↵a Fisher exact test for categoric data.
