The many variations in shape and extent of the parotid gland are well known. The parotid gland is larger than indicated in textbooks.14 Not only does this structure vary in different persons, but also on the two sides of the same person.36 Hetzar's15 finding of differences of the parotid glands in the two sexes and in persons of different ethnological origins could not be confirmed in children.39 There exist, in addition to the main parotid gland, accessory and secondary glands. Their frequency is variously estimated from 1% (at operation)1 and 19.7% of anatomical dissections22 to about 50% seen by sialography.4 Several basic types of anatomical configurations of the parotid gland and its duct system have been described by different authors.15,22,29,31
The terminal alveoli of the parotid gland are connected with the intralobular duct through intercalated ducts. The intralobular ducts give rise to
OPPENHEIM H, WING M. Sialography and Surface Anatomy of the Parotid Duct. AMA Arch Otolaryngol. 1960;71(1):80–83. doi:10.1001/archotol.1960.03770010084008
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