The mass of the external auditory canal was resected and surgical pathology revealed:

• Mastoid foramen mass, excision: Invasive basal cell carcinoma with focal squamoid differentiation including parotid gland tissue and around bony trabeculae. Perineural invasion is present.
• Tympanic bone lesion, biopsy: Invasive basal cell carcinoma invading around mature bony trabeculae.
• Left ear canal medial part skin lesion: Invasive basal cell carcinoma with focal squamoid differentiation
• Designated as ear auditory canal tumor, excision: Invasive basal cell carcinoma with focal squamoid differentiation invading parotid gland tissue.