Background: Primary malignant tumors involving Stensen's duct are rare neoplasms, with less than 30 cases reported. We report a case of primary squamous cell carcinoma (SCC) involving Stensen's duct in a patient infected with human immunodeficiency virus (HIV) and describe the role of fine-needle aspiration (FNA) and MRI in the diagnosis of this rare entity.
Methods: A 47-year-old man with HIV presented with intermittent parotid swelling and pain unresponsive to conservative treatment. He subsequently developed a mass emanating from Stensen's duct, and an MRI and ultrasound-guided FNA revealed carcinoma of Stensen's duct. Total parotidectomy with postoperative external beam radiation therapy was performed.
Results: The patient remains disease free 31 months after treatment.
Conclusions: Primary SCC of Stensen's duct is a rare entity that may mimic benign obstructive parotid disease. FNA and MRI are useful in the diagnosis and assessment of disease extent.