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Acinic cell carcinoma (ACC) is a low-grade malignant salivary neoplasm that constitutes approximately 17% of primary salivary gland malignancies. In the head and neck region, the parotid gland is the predominant site of origin and women are usually more frequently diagnosed than men.
A variety of skin lesions are considered precursors of squamous cell carcinoma. Actinic keratosis appears very similar to the less severe lesions of squamous cell carcinoma. It is always found on skin that has received heavy exposure to sunlight.