You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which parotid tumor spreads along nerve sheath ? and explain in detail?
Adenoid cystic carcinoma has got high affinity for perineural spread(both axially and circumferentially;antegrade and retrograde fashion) along mandibular and maxillary divisions of trigeminal (common) and facial nerve .It infiltrates nerve more proximally for long distance. Tumor may reach Gasserian trigeminal ganglion ,pterygopalatine ganglion and cavernous sinus SRB,5th,417 .