Facial process of parotid gland
Pain right temporal region, prior h/o right parotidectomy.
MRI Neck with contrast
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The right parotid gland is not visualised, soft tissue seen anterior to a hypertrophied left parotid that is similar in intensity and enhancement characteristics to normal parotid parenchyma. No nodules or masses.
Mild edema in left ramus of mandible due to recent dental procedure.
- There are two types of anterior gland extensions:
- 'facial process'- which is attached to the main gland.
- 'detached glandular mass' or accessory parotid gland- has a mean distance of separation from the gland of 6 mm.
- Accessory parotid gland is seen in 20% of the population.
- It usually occurs in a typical location i.e. overlying the masseter muscle and anterior to the parent gland.
- It lies superficial to the Stensen's duct and drains via an accessory duct into it.
- They have an independent blood supply from the transverse facial artery.
- These glands are usually small in size, may be multiple.
- Tumors of accessory glands are rare.
- Rastogi R, Bhargava S, Mallarajapatna GJ, Singh SK. Pictorial essay: Salivary gland imaging. The Indian Journal of Radiology & Imaging. 2012;22(4):325-333. doi:10.4103/0971-3026.111487.
- Ramachar SM, Huliyappa HA. Accessory parotid gland tumors. Annals of Maxillofacial Surgery. 2012;2(1):90-93. doi:10.4103/2231-0746.95334.
- Frommer, Jack. "The human accessory parotid gland: its incidence, nature, and significance." Oral Surgery, Oral Medicine, Oral Pathology 43.5 (1977): 671-676.
- Bancroft, Laura W, and Mellena D. Bridges. Mri Normal Variants and Pitfalls. Philadelphia, PA: Lippincott Williams and Wilkins, 2009. Print.