Sialolithiasis MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mahda Alihashemi M.D. [2]

Overview

Head and neck MRI may be helpful in the diagnosis of sialolithiasis Findings on MRI suggestive of sialolithiasis include low signal regions outlined by saliva ( high signal regions) on T2 weighted images. MRI can distinguished acute from chronic obstruction.

MRI

• Head and neck MRI may be helpful in the diagnosis of sialolithiasis. Findings on MRI suggestive of sialolithiasis include:
  • Stones are visible as low signal regions outlined by saliva (high signal regions) on T2 weighted images.

• Acute from chronic obstruction can be distinguished by MRI on T1 signals:
  • In acute obstruction, enlargement of the gland and inflammatory changes may be seen as reduced signal compared to other side.
  • In chronic cases, size of the gland is decreased and fatty atrophy may be seen as an increased signal compared to the other side.