Benign neck masses showing restricted diffusion: Is there a histological basis for discordant behavior?

• 作者: Abanti Das Alok Thakar Ashu S Bhalla Atin Kumar Meher Sharma Raju Sharma Shivanand Gamanagatti Suresh Sharma
• 来源期刊: 世界放射学杂志：英文版（电子版）
• 学科: 医学
• 关键词: DIFFUSION weighted imaging BENIGN neck MASSES RESTRICTED DIFFUSION
• 年，卷（期）: 2016,（2）
• 页码范围: 174-182
• 页数: 9页
• 分类号: R739.91

摘要

Diffusion weighted imaging(DWI) evolved as a complementary tool to morphologic imaging by offering additional functional information about lesions. Although the technique utilizes movement of water molecules to characterize biological tissues in terms of their cellularity, there are other factors related to the histological constitution of lesions which can have a significant bearing on DWI. Benign lesions with atypical histology including presence of lymphoid stroma, inherently increased cellularity or abundant extracellular collagen can impede movement of water molecules similar to malignant tissues and thereby, show restricted diffusion. Knowledge of these atypical entities while interpreting DWI in clinical practice can avoid potential misdiagnosis. This review aims to present an imaging spectrum of such benign neck masses which, owing to their distinct histology, can show discordant behavior on DWI.