Question:

Which of the following is false?
1. Parotid fistulae are most commonly congenital.
2. Parotid glands are serous salivary glands.
3. Accessory parotid glands are superior to the stenson`s duct.
4. Parotids arise from between the maxillary and mandibular processes.
5. Secretory component of parotids are ectodermal in origin.





Answer:

The correct answer for the question "Which of the following is false?" is:

1. Parotid fistulae are most commonly congenital.



Explanation
1. Parotid fistulae are most commonly of traumatic etiology. [Parotid fistulae generally arise secondary to trauma, surgery, malignancy, or infection and are seen more often in adults.]

2. Parotid glands are serous salivary glands. [Parotid glands are paired serous salivary glands located lateral and posterior to the masseter muscle.]

3. Accessory parotid glands are superior to the stenson`s duct. [These glands, mostly pea sized, unilateral, are located superior to the main parotid duct, anterior to the masseter, and separate from the parotid gland.]

4. Parotids arise from between the maxillary and mandibular processes. [The parotid gland can be recognized in human embryos at Stage 5 as an elongated furrow running dorsally from the angle of the mouth between the mandibular and maxillary prominences.]

5. Secretory component of parotids are ectodermal in origin. [The parenchymal part of the parotid gland is formed by branching of the blind end of the parotid tube and by the development of structures of ectodermal (secretory parenchymal) and mesodermal (stromal) nature.]



From the manuscript:
Accessory parotid gland with ectopic fistulous duct - Diagnosis by ultrasonography, digital fistulography, digital sialography and CT fistulography. A case report and review of current literature.
Radiology Case. 2011 July; 5(7):7-14


This article belongs to the Pediatric section.




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From the manuscript

Accessory parotid gland with ectopic fistulous duct - Diagnosis by ultrasonography, digital fistulography, digital sialography and CT fistulography. A case report and review of current literature.

Free full text article: Accessory parotid gland with ectopic fistulous duct - Diagnosis by ultrasonography, digital fistulography, digital sialography and CT fistulography. A case report and review of current literature.

Abstract
Accessory parotid glands are a common clinical occurrence and usually drain into the main Stenson`s duct by small ductules and thereby, into the buccal cavity. Presence of an accessory parotid gland with an ectopic fistulous duct is a rare occurrence. We present the imaging findings in a case of right accessory parotid gland with ectopic fistulous duct associated with bilateral pre-aural appendages. Diagnostic workup was done by ultrasonography, sono-fistulography, contrast digital fistulography, contrast digital sialography and computed tomography fistulography. Imaging showed a right accessory parotid gland lying anterior to and separate from the main parotid gland draining via an ectopic fistulous duct opening over the right cheek. The child was managed surgically by internalisation of the duct to open into the buccal mucosa and excision of pre-aural appendages.






References



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