fig 4.

50-year-old man with left submandibular sialolith.

A, CT shows sialolith (arrow) in proximal one third of main duct. Affected gland is atrophic.

B, T1-weighted MR image (500/14/2 [TR/TE/excitations]) of affected gland (arrow) shows higher signal intensity compared with gland on right side.

C, Fat-suppressed T2-weighted MR image (3000/96/2 [TR/TE/excitations]) shows lower signal intensity compared with normal right side.

D, Photomicrograph of excised gland shows extensive fat replacement of gland tissues. Original magnification, ×200.