Fujihara Fumiaki, Takahara Masaki, Katsuta Toshiro, Takemoto Koichiro, Higashi Toshio, Inoue Tooru
Department of Neurosurgery, Saiseikai Karatsu Hospital, Karatsu, Saga, Japan.
Department of Neurosurgery, Faculty of Medicine, Fukuoka University, Fukuoka, Fukuoka, Japan.
NMC Case Rep J. 2018 Dec 18;6(1):21-24. doi: 10.2176/nmccrj.cr.2018-0171. eCollection 2019 Jan.
The variation in which the posterior inferior cerebellar artery arises from the hypoglossal branch of the ascending pharyngeal artery is thought to be related to the remnant of the primitive hypoglossal artery, and is referred to as a primitive hypoglossal artery variant. Cases in which the posterior inferior cerebellar artery arises from the jugular branch of the ascending pharyngeal artery are extremely rare. The authors present a case of a 50-year-old male with vertebral artery dissection who had this extremely rare variation bilaterally. The patient also had several rare variations of the intracranial vessels. This posterior inferior cerebellar artery arising from the jugular branch of the ascending pharyngeal artery may have developed due to the anastomosis between the meningeal and the pial vessels of the posterior fossa. Alternatively, an unknown primitive anastomotic artery may have passed through the jugular foramen. Genetic factors may play an important role in the presence of this anomalous vessel.
小脑后下动脉起源于咽升动脉舌下神经支的变异被认为与原始舌下动脉的残留有关，被称为原始舌下动脉变异。小脑后下动脉起源于咽升动脉颈静脉支的病例极为罕见。作者报告了一例50岁男性椎动脉夹层患者，其双侧存在这种极其罕见的变异。该患者还存在颅内血管的几种罕见变异。这种起源于咽升动脉颈静脉支的小脑后下动脉可能是由于后颅窝脑膜血管与软脑膜血管之间的吻合而形成的。或者，一条未知的原始吻合动脉可能穿过了颈静脉孔。遗传因素可能在这种异常血管的存在中起重要作用。
