A rare cause of benign parotid tumor: Parotid oncocytoma in a young patient

Abstract

Background

Parotid oncocytomas are rare benign tumors, comprising 0.1–1.5 % of salivary gland neoplasms, predominantly occurring in the parotid gland. They present diagnostic challenges due to their non-specific clinical features, such as painless swelling.

Case presentation

A 20-year-old female presented with a 2-year history of progressive left facial swelling. Physical examination revealed a 2.5 cm, soft, non-pulsatile mass in the left parotid region. Imaging (ultrasound and MRI) showed a lobulated, highly vascular mass with solid and cystic components. Surgical excision via superficial parotidectomy was performed, revealing a well-defined oncocytic tumor with eosinophilic cytoplasm. Histology confirmed the diagnosis. The patient remains disease-free after 10 years of follow-up.

Conclusion

Parotid oncocytoma is a rare benign tumor that can be challenging to diagnose. MRI and histology are crucial for accurate diagnosis. Complete excision is the treatment of choice, with long-term follow-up recommended due to the potential for recurrence.