Pleomorphic adenoma of salivary glands: common and uncommon CT and MR imaging features

Pleomorphic adenoma of salivary glands: common and uncommon CT and MR imaging features Pleomorphic adenoma (PA) is the most common salivary gland tumor and is characterized by cytomorphological and architectural diversity. On CT and MR images, PAs are shown as well-defined lesions occasionally accompanied by characteristic lobulated contours. On T2-weighted images, typical PAs show marked hyperintensity, which reflects the abundant myxochondroid stroma, with a hypointense rim indicating the fibrous capsule. However, intratumoral signal intensity varies according to the cellular density, proportion of epithelial and stromal components, and type of stromal components. In addition, a variety of secondary histological changes, including fibrosis, lipometaplasia, ossification, cystic degeneration, and infarction, occur rarely in PAs; therefore, they are associated with difficulty in differential diagnosis from other salivary gland tumors. This review article describes the common and uncommon CT and MR imaging features of PA of the salivary glands. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Japanese Journal of Radiology Springer Journals

Pleomorphic adenoma of salivary glands: common and uncommon CT and MR imaging features

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Publisher
Springer Japan
Copyright
Copyright © 2018 by Japan Radiological Society
Subject
Medicine & Public Health; Imaging / Radiology; Nuclear Medicine; Radiotherapy
ISSN
1867-1071
eISSN
1867-108X
D.O.I.
10.1007/s11604-018-0747-y
Publisher site
See Article on Publisher Site

Abstract

Pleomorphic adenoma (PA) is the most common salivary gland tumor and is characterized by cytomorphological and architectural diversity. On CT and MR images, PAs are shown as well-defined lesions occasionally accompanied by characteristic lobulated contours. On T2-weighted images, typical PAs show marked hyperintensity, which reflects the abundant myxochondroid stroma, with a hypointense rim indicating the fibrous capsule. However, intratumoral signal intensity varies according to the cellular density, proportion of epithelial and stromal components, and type of stromal components. In addition, a variety of secondary histological changes, including fibrosis, lipometaplasia, ossification, cystic degeneration, and infarction, occur rarely in PAs; therefore, they are associated with difficulty in differential diagnosis from other salivary gland tumors. This review article describes the common and uncommon CT and MR imaging features of PA of the salivary glands.

Journal

Japanese Journal of RadiologySpringer Journals

Published: May 29, 2018

References

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