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Arch Otolaryngol Head Neck Surg. 2003;129:596.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Diagnosis: Patency of Huschke foramen and fistula formation between the auditory canal and the parotid gland

A foregut derivative, the fetal branchial apparatus, develops during the second fetal week and consists of 5 paired pharyngeal arches, separated internally by 4 endodermal pouches and externally by 4 ectodermal clefts. First branchial cleft anomalies may occur anywhere from the external auditory canal to the angle of the mandible, including the parotid gland. Although several attempts have been made to classify first branchial cleft anomalies by location and histologic characteristics, they are currently considered to represent a spectrum of malformations. Cysts associated with the external auditory canal may present with aural fistulae, auricular swelling, otitis, and otorrhea. Those involving the parotid gland may be found lying either deep within or superficial to it. The differential diagnosis of other cystic lesions of the parotid gland includes neoplasms, lymphadenopathy, and lymphoepithelial cysts. A sialocele, representing ductal obstruction caused by trauma or a calculus, could also mimic a first branchial cleft cyst. . . . [Full Text of this Article]

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Arch Otolaryngol Head Neck Surg. 2003;129(5):594.
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