Acinic cell carcinoma is a rare variant of neoplastic lesions in the parotid gland. It is more frequent in women and commonly seen in the 4th- 5th decades of life. The most common presentation of the condition is a painless and slow growing mass over the parotid gland. Majorityof the acinic cell carcinomas are located on the superficial lobe of the gland. Primary treatment modality is surgery and the prognosis of thetumour is generally favorable. Histological grading should be kept in mind in the treatment of the condition. Histological subtypes of thetumour are papillary, cystic, and follicular and other variants have good prognosis. A rare form of the tumour is dedifferantiated variantwhich can be transformed into high grade tumours. The differantiated acinic cell carcinoma is more aggressive than the other forms andrecurrent perineural and perilymphatic invasion and, therefore, systemic metasthasis are more common. In this article, the management ofa 77-year-old case of dedifferentiated acinic cell carcinoma, who was admitted with the complaint of mass over the right parotid gland forone year, is presented along with the relevant literature.