Carcinoma ex-pleomorphic adenoma of parotid

Discussion:

Key learning points:

1. The imaging findings of heterogenous signal and irregular margins are not typical for a pleomorphic adenoma, which is the most common mass within the parotid.  These findings suggest a malignant etiology.

2. Pleomorphic adenomata are usually surgically excised due to the small risk of malignant transformation.

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