A 45-year-old man with a 6-month history of a 3.7 cm, enlarging left parotid gland mass. An MRI showed a nodular, slightly irregular lesion with variable signal intensity located in the superficial parotid gland just lateral to the facial nerve. An FNA was performed.
NEOPLASM: Salivary Gland Neoplasm of Uncertain Malignant Potential
Basaloid neoplasm, suggestive of basal cell adenoma. See note.
Note: The differential diagnosis of a basaloid neoplasm of salivary gland origin includes both benign and malignant tumors.
The patient had a superficial parotidectomy.
Frozen section favored a basal cell adenoma; resection margins were negative.
Final histologic evaluation revealed focal invasion consistent with basal cell adenocarcinoma.
The patient has been disease-free for over 6 years.