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Three cases of reflux of contrast medium from the duct system into the gland substance in sialography are described. 2. The term sialo-acinar reflux is suggested as a means of describing this condition to differentiate it from the spread of lipiodol from the duct itself into the interstitial tissue of the gland from actual rupture of the ducts. 3. The part played by over-distension of the duct system and a chronic infection in the production of this condition are discussed.
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Eric Samuel (1950) studied this question.
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