Superior cerebellar vein
The superior cerebellar vein is formed by the union of the precentral cerebellar vein and superior vermian vein in the quadrigeminal cistern and ascends vertically as an unpaired structure to drain into the inferior aspect of the proximal (anterior) great cerebral vein of Galen 1) 2)
The precentral cerebellar vein and superior vermian vein enter the vein of Galen from below and are fused in almost half of all studied patients, creating a third vessel by the name of the superior cerebellar vein 3)
1)
Huang YP, Wolf BS. The veins of the posterior fossa–superior or galenic draining group. (1965) The American journal of roentgenology, radium therapy, and nuclear medicine. 95 (4): 808-21. doi:10.2214/ajr.95.4.808
2)
Chaynes P, Microsurgical anatomy of the great cerebral vein of Galen and its tributaries. (2003) Journal of Neurosurgery. 99 (6): 1028. doi:10.3171/jns.2003.99.6.1028
3)
Krogager ME, Jespersen B, Mathiesen TI, Benndorf G. Three underdogs among galenic veins: anatomical analysis and literature review of surgical relevant veins in the quadrigeminal cistern. Neurosurg Rev. 2022 Aug 10. doi: 10.1007/s10143-022-01842-z. Epub ahead of print. PMID: 35947231.