Most are seen in submandibular gland (60%–90%)
Parotid gland is 2nd most common site (10%–20%)
20% are radiopaque
Cause mechanical obstruction resulting in recurrent swelling and may be complicated by bacterial infection
US:
Smaller stones may not cast shadow
Air bubbles within duct may mislead
Heterogenous gland due to recurrent infections
CT:
Smaller stones may not be visible
MR:
MR sialography is promising
Sialography and stone extraction:
Detailed anatomy with stone extraction
References:
1. BialekEJ etal. US of the Major Salivary Glands: Anatomy and Spatial Relationships, Pathologic Conditions, and Pitfalls. RadioGraphics 2006;26:745-763
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Although I have taken care to make my blog posts as accurately as possible, the blog itself is not replacement for text-books and journals. The blogger does not accept any harm or injury related to the use of the material from this blog. All the images are from my collection and are not copyrighted; hence feel free to use them and I do not want any credit also. The notes are from the quoted journals and text-books, relevant to my practice. If anybody feels I am violating copyright, please let me know. I will delete the relevant data from my blog. I am greatly indebted to the reference book Som PM et al, Head and Neck Imaging. 4th edition. Mosby publications. Unless given the reference, the reference is most likely to this book.
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