Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Adenoid cystic carcinoma ?
    ### Response:
    Adenoid cystic carcinoma (ACC) is a rare form of adenocarcinoma, which is cancer that begins in gladular tissues. ACC most commonly arises in the head and neck, in various parts of the major and minor salivary glands including the palate, nasopharynx, lining of the mouth, voice box (larynx) or windpipe (trachea).
    