Tongue Adenoid Cystic Carcinoma Presenting as Trigeminal Neuralgia: A Case reportWeijunWang1 BoSong1ˊHuiyingHuang2 YuMao3QingMa4 QunCao5YuexiGan61,3,4North Sichuan Medical University,2,5,6Leshan People’s Hospital,1ˊMeishan City People’s HospitalAbstract: The trigeminal nerve provides extensive sensory innervation to the face. The most common trigeminal nerve disorder is trigeminal neuralgia, classically defined as paroxysmal neuropathic pain occurring in the distribution of the trigeminal nerve. In 80–90% of cases, the cause is associated with vascular abnormalities, typically due to vascular compression of the trigeminal neurovascular system, leading to nerve impingement at its exit from the brainstem. For medically refractory pain, trigeminal nerve blockade under image guidance can be employed as a treatment option. Rare cases of trigeminal neuralgia may also result from compression by trigeminal nerve masses. Adenoid cystic carcinoma (ACC) is a rare malignant tumor that arises in various regions of secretory glands and accounts for 1–2% of all head and neck cancers. Primary ACC originating in the minor salivary glands of the tongue is extremely rare. We present a case of a 58-year-old female with invasive oral adenoid cystic carcinoma presenting with trigeminal neuralgia.Keywords: Oral Cancer, Trigeminal Neuralgia, Adenoid Cystic Carcinoma, Pathological Biopsy, Palliative Care, Tubular Type