Magnetic resonance imaging of parotid gland tumors: a pictorial essay

Soung Yung Kim, Urs Borner, Jung Hyun Lee, Franca Wagner, Dechen W. Tshering Vogel

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Imaging of parotid gland tumors is challenging due to the wide variety of differential diagnoses. Malignant parotid tumors can have very similar features to benign ones, such as slow growth and displacement instead of infiltration of neighboring structures. Malignant and benign tumors may therefore not be clinically distinguishable. Correct characterization of parotid tumors (i.e., benign or malignant) determines preoperative treatment planning and is important in optimizing the individualized surgical plan. Magnetic resonance imaging (MRI) is the imaging modality of choice for evaluation of suspected parotid gland lesions and differentiation between benign and malignant lesions. Certain conventional MRI features can suggest whether a mass is more likely to be a benign or low-grade malignancy or a high-grade malignancy and adding diffusion-weighted imaging or advanced MRI techniques like perfusion can aid in this distinction. Morphological features seen on MRI, such as low signal on T2-w, infiltrative changes or ill-defined margins, change over time and diffusion restriction can point to the malignant nature of the lesion. MRI is useful for detection and localization of the lesion(s), and associated findings like perineural spread of tumor, lymph node involvement and infiltrative changes of the surrounding tissues. In this pictorial essay, we present selected images of a variety of benign and malignant parotid tumors and emphasize the MRI features that may be useful in their characterization.

Original languageEnglish
Article number191
JournalBMC Medical Imaging
Volume22
Issue number1
DOIs
StatePublished - Dec 2022

Keywords

  • Benign parotid gland tumors
  • Imaging features
  • Magnetic resonance imaging
  • Malignant parotid gland tumors

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