Facial process of parotid gland

Case contributed by Dr Prashant Gupta

Presentation

Pain right temporal region, prior h/o right parotidectomy.

Patient Data

Age: 56
Gender: Female

MRI Neck with contrast

Modality: MRI

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.

Case Discussion

  • 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.

 

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Case Information

rID: 43976
Case created: 31st Mar 2016
Last edited: 5th Apr 2016
System: Head & Neck
Inclusion in quiz mode: Included

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