9. Case 1
• Recurrent pain and
swelling right
submandibular
region , ?
Submandibular
sialdenitis.
10. MR SIALOGRAM
Longitudinal projection
Axial projection
Dilated right submandibular duct with calculi. Normal left
submandibular duct.
11. MR sialogram showing
submandibular and parotid
ducts.
• MR sialogram compares
favorably with digital
sialography in
visualization of ducts
and more easier to
perform.
13. T1 axial T2 axial
A mass seen at left
carotid bifurcation.
Post contrast T1
axial
14. Angiogram showing Tumor at
carotid bifurcation displacing
internal and external carotid
arteries
Salt and pepper sign
15. Diagnosis- carotid body tumor
• Characteristically is a hypervascular tumor
located at carotid bifurcation.
• It is a paraganglioma or chemodectoma.
16. Case 3
• 31 year old male presenting with multiple
cranial nerve palsies on right side.
28. So , is there a mass in larynx..?
• Direct laryngoscopy – no mass.
• Remember that chages seen in MRI are
secondary to recurrent laryngeal palsy.
• They do not represent tumor.
• Larynx imaging findings should always be
correlated with laryngoscopy findings
29. CT versus MRI in neck masses
• Which modality is tough decision.
• In general pediatric patients , upper neck , skull base
lesions are better assessed with MRI.
• Lower neck masses , suspicious of bone involvement
are better assessed with CT.
• MRI can be done without contrast , CT will need
contrast generally.
• In thyroid malignancy , preoperative contrast CT is
contraindicated.