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Objective: Preoperative foresight of primary parotid tumors is decisive for surgical planning. We aimed to assign the role of 3 tesla diffusion-weighted magnetic resonance (3T DW-MR) imaging, apparent diffusion coefficient (ADC) mapping, aging, and gendering in differentiating the primary parotid tumor subtypes on the basis of histopathological correlation.
Methods: Thirty-one primary parotid tumors and tumor-free contralateral parotid glands of the same patients were evaluated retrospectively. The 3T DW-MR imaging, ADC, calculated apparent diffusion coefficient value, and demographic data were compared, and receiver operating characteristic analysis was carried out with histopathological results. A P-value <.05 was considered to be statistically significant.
Results: The apparent diffusion coefficient value of primer parotid tumors (n=31) was 1.43 ± 0.51 × 10–3 mm2 /s, of benign parotid tumors (n=25) was 1.61 ± 0.38 × 10–3 mm2 /s [Warthin tumors (n=7): 1.14 ± 0.20 × 10–3 mm2 /s, pleomorphic adenomas (n=18): 1.80 ± 0.24 × 10–3 mm2 /s], of malignant parotid tumors (n=6) was 0.69 ± 0.25 × 10–3 mm2 /s, and of normal parotid gland (n=31) was 0.94 ± 0.18 × 10–3 mm2 /s. Statistically, an intergroup differences was found between malignant and benign parotid tumors (P < .001). An intragroup difference was found between Warthin tumor and pleomorphic adenoma (P < .001). The results showed that aging and gendering were significantly different within primary parotid tumors (P < .001).
Conclusion: Using the results of 3T DW-MR imaging and ADC mapping with aging and gendering may provide preoperative primary parotid tumor characterization. The ADC value and age and gender might be useful in differentiating benign malign primary parotid tumors including subtypes such as Warthin tumor and pleomorphic adenoma. This aspect might be applied in routine applications.
Cite this article as: Dusak A, Ağyar A, Çelik M, Shermatova S, Kaya V, Güldür ME. The role of 3 Tesla diffusion weighted-magnetic resonance imaging and apparent diffusion coefficient mapping with aging and gendering in primary parotid tumors: Preoperative foresight of histopathological subtypes. Current Research in MRI. 2022;1(3):63-70.