Abstract
The parotid gland is the largest salivary gland in humans, and produces mainly serous secretions. The secretion of this gland reaches the oral cavity through single parotid duct (Stensen’s duct). The parotid duct begins at the anterior border of the gland, crosses the masseter, and then pierces the buccinator and open the mouth. The present study reports a rare variation of a unilateral double parotid duct that was observed in the right side of the face of a 75-year-old male cadaver during dissection. The embryological basis of this variation can be explained as follows. A sprout originates from epithelium lining the primitive oral cavity, grows dorsally, and bifurcates. The end parts of these branches invaginate into the adjacent mesenchyme separately, proliferate, and make the parotid gland, while their proximal parts later form communicating ducts (D1 and D2) connecting the gland to the mouth. Furthermore, the clinical importance of this variation was discussed.
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References
Aktan ZA, Bilge O, Atamaz Pinar Y, Omer Ikiz A (2001) Duplication of the parotid duct a previously unreported anomaly. Surg Radiol Anat 23(5):353–354
Astik RB, Dave UH (2011) Embryological basis of bilateral double parotid ducts: a rare anatomic variation. Int J Anat Vari (IJAV) 4:141–143
Avery JK, Steele PF, Avery N (2002) Oral development and histology, 3rd edn. Thieme, New York, pp 293–296
Fernandes ACS, Lima RG, Rossi MA, Aguiar MC (2009) Parotid gland with double duct: an anatomic variation description. Int J Morphol 27(1):129–132
Moore KL, Dalley AF (2005) Clinically oriented anatomy, 5th edn. Lippincott Williams & Wilkins, Toronto
Moore KL, Persaud TVN (2002) The developing human: clinically oriented embryology, 7th edn. Saunders, Philadelphia
Peterson LJ, Ellis E, Hupp JR, Tucker MR (2002) Contemporary oral and maxillofacial surgery, 4th edn. Mosby, USA
Samanta PP, Rana KK, Khan RQ, Das S (2007) An unusually located human accessory parotid gland. A case report. Braz J Morphol Sci 24(1):53–54
Spooner BS, Faubion JM (1980) Collagen involvement in branching morphogenesis of embryonic lung and salivary gland. Dev Biol 77:84–102
Standring S, Borley NR, Collins P, Crossman AR, Gatzoulis MA, Healy JC, Johnson D, Mahadevan V, Newell RL, Wigley CB (2008) Gray’s anatomy: the anatomical basis of clinical practice, 40th edn. Churchill Livingstone: Elsevier, London
Williams PL, Warwick R, Dyson M, Bannister LH (2005) Gray`s Anatomy, 39th edn. Churchill Livingstone, London
Zenk J, Hosemann WG, Iro H (1998) Diameters of the main excretory ducts of the adult human submandibular and parotid glands. Oral Surg Oral Med Oral Pathol Oral Radiol. Endodontol 85(5):576–580
Acknowledgments
The authors of this article thank Mr. Eslami for taking cadaveric photographs and Mr. Mehdinejad for providing histological sections and Mr. Lotfi, our medicine student, for taking histological photographs.
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The authors declare that they have no competing interests.
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Hassanzadeh Taheri, M.M., Afshar, M. & Zardast, M. Unilateral duplication of the parotid duct, its embryological basis and clinical significance: a rare cadaveric case report. Anat Sci Int 90, 197–200 (2015). https://doi.org/10.1007/s12565-014-0243-0
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DOI: https://doi.org/10.1007/s12565-014-0243-0