Parapharyngeal pleomorphic adenoma

Case contributed by Ian Bickle


Smooth right peritonsillar mass displacing the tonsil medially. Ultrasound - mass deep to the partoid gland. Cause?

Patient Data

Age: 40
Gender: Male

4.8 x 3.8 cm non-enhancing soft tissue mass occupying the right parapharyngeal space displacing the right paratonsillar fossa medially.  It is separate from the deep parotid gland. The tonsillar glands are otherwise unremarkable.

The right medial pterygoid muscle is not separately identified from the mass.

A coupl of reactive right submandibular lymph nodes  No significant cervical lymphadenopathy.

The visualized parotid and submandibular glands are unremarkable.

Normal thyroid gland.

No osseous destruction.

Case Discussion

Endoscopic biopsy of the peritonsillar mass was undertaken.

Histology:  Pleomorphic adenoma

This is likely to have arisen from one of the minor salivary glands and represent less than 1% of all pleomorphic adenomas.

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