42 years old man with left sided pain on eating with old USG (2 weeks) suggesting tiny calculus in the Stensen's duct. The MRI shows essentially normal gland (left) with asymmetrically prominent duct (as compared to the right), within the gland / at the exit / stensen's components. The musculature and soft tissues are normal, could represent recently passed calculus / inflammation.
Teaching points by Dr MGK Murthy, MRI Technician- Umamaheshwar:
Stensen's duct is 4 to 7 cm long and 2 to 3 mm in diameter.
MDCT Sialogram is an ideal modality for evaluation. MR plays complementory role in ductal evaluation with excellent resolution of the glandular anatomy as well as the surrounding soft tissues.
An oblique X-ray along with MRI would complete the routine evaluation without invasive ductography.