Non-sebaceous lymphadenoma of the submandibular gland: Diagnostic challenges in the head and neck cancer pathway

Abstract

Non-sebaceous lymphadenoma (NSLA) is a rare benign salivary gland tumour with lymphoid and epithelial components and without sebaceous differentiation. The large majority of the reported casesarise within the parotid gland. We present an NSLA arising from the submandibular gland. The tumour presented as a painless longstanding neck lump. Ultrasound, fine needle aspiration, MRI and positron emission tomography found features supportive of squamous cell carcinoma. The patient was treatedwith surgery for oropharyngeal carcinoma of unknown origin, in accordance with local and national guidelines. The final histological assessment revealed the level Ib neck lesion to be NSLA. Althougha rare occurrence, these lesions may pose a diagnostic challenge in the head and neck cancer pathway.