Inter- and Intratumoral Variability in Magnetic Resonance Imaging of Pleomorphic Adenoma: An Attempt to Interpret the Variable Magnetic Resonance Findings

Ken Motoori, Seiji Yamamoto, Takuya Ueda, Koichi Nakano, Takayuki Muto, Yuichiro Nagai, Mitsuaki Ikeda, Hiroyuki Funatsu, Hisao Ito

Research output: Contribution to journalReview articlepeer-review

78 Citations (Scopus)

Abstract

Objectives: The purpose of our study was to describe the various magnetic resonance (MR) findings of pleomorphic adenoma and to interpret these findings. Methods: MR studies of 33 pleomorphic adenomas and 13 malignant tumors in the major salivary glands were reviewed. Results: High signal intensity on short-inversion-time inversion recovery (STIR) and T2-weighted (T2W) images, progressive enhancement on dynamic MR images, and high apparent diffusion coefficient (ADC) values on diffusion-weighted (DW) images reflected myxoid-dominant components in pleomorphic adenomas. Hypercellularity with less-myxoid stroma showed reduced signal intensity on STIR and T2W images and also reduced ADC values on DW images, and the peak of time versus signal intensity curves (TICs) was reached earlier on dynamic MR images. Conclusions: The MR images of hypercellularity components in pleomorphic adenoma overlap with those of malignant parotid tumors. Detecting myxoid components by STIR, T2W, DW, and dynamic MR images is useful for predicting whether salivary gland tumors are pleomorphic adenoma or not.

Original languageEnglish
Pages (from-to)233-246
Number of pages14
JournalJournal of Computer Assisted Tomography
Volume28
Issue number2
DOIs
Publication statusPublished - 2004 Mar 1
Externally publishedYes

Keywords

  • Magnetic resonance (MR) imaging
  • Parotid gland
  • Pleomorphic adenoma

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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