To confirm the presence of a salivary gland stone you'll have a sialogram, in which a dye is injected directly into the blocked duct and an X-ray of the area is taken.
With obstructive parotid pathology in mind a parotid sialogram was undertaken which showed no evidence of calculus formation, but demonstrated an area of altered ductal architecture stretching around a mass in the mandible.
Typically in such cases, an ultrasound (US) or conventional sialogram would be requested in seeking obstructed or dilated ducts, a ductal calculus or an abscess within the gland.
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