Ravina Kristine, Khorasanizadeh Mirhojjat, Chang Yu-Ming, Ogilvy Christopher S, Thomas Ajith J
Neurosurgery, Boston Medical Center, Boston, USA.
Neurosurgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, USA.
Cureus. 2022 May 26;14(5):e25350. doi: 10.7759/cureus.25350. eCollection 2022 May.
Extra-axial developmental venous anomalies (DVAs) are important anatomic structures that contribute to supplemental venous drainage of intracranial contents into the extracranial veins. We present the case of a 35-year-old woman with a sudden-onset severe headache, nausea, and vomiting who was found to have an atraumatic subarachnoid hemorrhage of left frontal convexity. Workup revealed a large anomalous extra-axial vein originating in the right frontal area, traversing the left frontal region, penetrating the left frontal bone just above the supraorbital foramen with likely drainage into the left external jugular vein. This vein could not be classified as an emissary vein given the lack of direct communication with the superior sagittal sinus anterior portion, which was found to be hypoplastic. This case report adds to the literature a description of a previously unreported midline traversing frontal extra-axial vein directly draining frontal lobes with a potential implication in an atraumatic subarachnoid hemorrhage of frontal convexity.
轴外发育性静脉异常（DVAs）是重要的解剖结构，有助于将颅内内容物的静脉血引流至颅外静脉。我们报告了一例35岁女性，突发严重头痛、恶心和呕吐，经检查发现左侧额部凸面发生非创伤性蛛网膜下腔出血。检查发现一条粗大的异常轴外静脉起源于右侧额叶区域，穿过左侧额叶，在眶上孔上方穿透左侧额骨，可能引流至左侧颈外静脉。鉴于该静脉与发育不全的上矢状窦前部缺乏直接连通，故不能归类为导静脉。本病例报告在文献中增加了对一条先前未报道的横贯额叶中线的轴外静脉的描述，该静脉直接引流额叶，可能与额部凸面的非创伤性蛛网膜下腔出血有关。
