Article Figures & Data
Figures
- Fig 1.
Visualization of the intraparotid facial nerve on the 3D-DESS-WE sequence. Reformatted sagittal image of the 3D-DESS-WE sequence clearly shows the intraparotid facial nerve (arrows).
- Fig 2.
A 71-year-old woman with pleomorphic adenoma of the right parotid gland. A, Axial source image of the 3D-DESS-WE sequence. B, Coronal reformatted image of the 3D-DESS-WE sequence. Axial and reformatted coronal images of the 3D-DESS-WE sequence show the intraparotid facial nerve trunk (A and B, arrows) and temporofacial trunk (A and B, arrowheads) coursing medially to the parotid mass (A and B, asterisk), suggesting localization to the superficial lobe.
- Fig 3.
A 65-year-old woman with basal cell adenoma of the left parotid gland. A, Axial source image of the 3D-DESS-WE sequence. B, Coronal reformatted image of the 3D-DESS-WE sequence. Axial and reformatted coronal 3D-DESS-WE images show the intraparotid facial nerve trunk (arrows) coursing lateral to the parotid mass (asterisk), suggesting localization to the deep lobe.
- Fig 4.
Indirect methods to approximate the intraparotid facial nerve: facial nerve line (solid line), retromandibular vein (dotted circle), and Utrecht line (dotted line).
Tables
Histologic Types Surgical Findings Superficial Lobe Deep Lobe Benign tumors Pleomorphic adenoma 57 44 13 Warthin tumor 15 13 2 Basal cell adenoma 3 2 1 Myoepithelioma 1 1 0 Lymphoepithelial cyst 3 3 0 Reactive lymphadenopathy 1 1 0 Inflammation 1 1 0 Malignant tumors Malignant lymphoma 1 1 0 Metastatic tumor 2 2 0 Oncocytic carcinoma 1 1 0 Acinic cell carcinoma 2 2 0 Carcinoma ex pleomorphic adenoma 1 1 0 Basal cell adenocarcinoma 1 1 0 Salivary duct carcinoma 2 2 0 Total 91 75 16 - Table 2:
Interobserver variabilities in determining the location of the parotid lesion with direct and indirect methods
Interobserver Variability No. Concordance κ Direct method 91 88 0.870 FNL 81 0.587 RMV 86 0.706 UL 75 0.471 - Table 3:
Localization of parotid lesions with imaging and surgical findings and the diagnostic performance of the surgically confirmed deep lobe lesionsa
Surgical Findings Diagnostic Performance (Deep Lobe Lesions) (%) (95% CI) Deep Lobe Superficial Lobe Accuracy Sensitivity Specificity PPV NPV 1) Direct method Deep lobe 14 0 97.8 (91.4–97.8) 87.5 (69.2–87.5) 100 (96.1–100) 100 (79.0–100) 97.4 (93.6–97.4) Superficial lobe 2 75 2) FNL Deep lobe 6 5 83.5 (76.7–89.7) (P = .065) 37.5 (18.0–55.0) (P = .008b) 93.3 (89.2–97.1) (P = .063) 54.4 (26.2–80.1) 87.5 (83.6–91.0) Superficial lobe 10 70 3) RMV Deep lobe 8 0 91.2 (84.7–91.2) (P = .727) 50.0 (31.6–50.0) (P = .031b) 100 (96.1–100) (NA) 100 (63.2–100) 90.4 (86.8–90.4) Superficial lobe 8 75 4) UL Deep lobe 8 8 82.4 (74.6–89.5) (P = .002b) 50 (27.8–70.1) (P = .070) 89.3 (84.6–93.6) (P = .008b) 50 (27.8–70.1) 89.3 (84.6–93.6) Superficial lobe 8 67
