Scientific Exhibits
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REGIONAL EXTENSION

Now viewing: Case 14

Case 14 - Squamous cell carcinoma of right external auditory canal with possible perineural extension to mastoid segment of facial nerve

A 49-year-old male had tumor mass in the right external auditory canal. Biopsy revealed squamous cell carcinoma. Resection of the tumor mass in the external auditory canal was performed with removal of the superficial limits of the external auditory bony canal. Histopathology revealed invasive squamous cell carcinoma of the right external auditory canal with focal squamous cell carcinoma of the overlying tissue of the mastoid. The vascular, lymphatic and perineural invasion were not seen, however, the actual tumor volume is small and thus may not be representative.

Axial post-contrast T1-weighted MR image (TR 600/TE 12) at the level of auditory canal: A contrast-enhanced soft tissue mass in the right external auditory canal (arrow). Sagittal post-contrast T1-weighted MR image (TR 600/TE 12) 40 mm to the right: the mastoid segment of the facial nerve is well shown with minimal enhancement suggesting early tumor involvement.