Low-Grade Acinic Cell Carcinoma of the Parotid Gland in a Young Adult: A Case Report.

Acinic cell carcinoma (ACC) of the parotid gland is a rare salivary gland malignancy, typically presenting as a painless swelling. We report the case of a 32-year-old male patient who presented with a right neck swelling and was diagnosed with low-grade ACC of the superficial parotid gland. Surgical excision with total parotidectomy and facial nerve preservation was performed. Histopathology confirmed low-grade ACC without vascular or perineural invasion, and lymph nodes were negative. Postoperatively, the patient developed marginal mandibular branch weakness but remains free of recurrence under ongoing surveillance. Early diagnosis and complete surgical excision can lead to favorable outcomes in low-grade ACC, although long-term follow-up is necessary.