MRI and MR sialography can non-invasively delineate the parenchymal and ductal system abnormalities of the parotid glands in children with JRP. Although MR and MR sialography cannot substitute US, they can accurately depict findings such as sialectasis and signal intensity changes in the parotid gland depending upon the phase of the disease (acute vs. chronic inflammation). The radiologist should be familiar with MR findings of JRP.
In such cases, pre-operative imaging (with sialography, magnetic resonance sialography and computed tomography sialography with fistulography) is helpful for exact delineation of the ductal anatomy. To the best of our knowledge, only four previous cases of congenital accessory parotid gland fistula have been reported in the English literature.
Magnetic resonance sialography is helpful in delineating the anatomy of the submandibular duct non-invasively and without associated radiation exposure. To the best of our knowledge this is the first report of magnetic resonance identifying an accessory submandibular duct and gland.
MR sialography using CISS and HASTE sequences is a promising technique and has the potential to replace conventional sialography in patients with inflammatory salivary gland disorders.
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