%0 Journal Article
%T Ring-shaped Dandy's superior petrosal vein.
%A Rusu MC
%A Lazăr M
%A Vrapciu AD
%J Surg Radiol Anat
%V 45
%N 12
%D 2023 Dec 9
%M 37812287
%F 1.354
%R 10.1007/s00276-023-03248-y
%X <B>BACKGROUND: </B>Dandy's superior petrosal vein (SPV) anatomy is highly relevant for neurosurgeons. The SPV drains into the superior petrosal sinus (SPS), closely related to the trigeminal and internal auditory pores.<BR><B>METHODS: </B>The archived enhanced MRI files of a male patient were studied.<BR><B>RESULTS: </B>An infratentorial ring-shaped (RS) SPV was found on the petrosal surface of the right cerebellar hemisphere. It was inserted in the SPS above the internal auditory pore, postero-lateral to the trigeminal pore. The anterior arm of that venous ring received a delicate supratrigeminal plexus of veins from the pontine surface and continued as a single venous trunk on the cerebellar surface.<BR><B>CONCLUSIONS: </B>Such previously unreported RS-SPV is of utmost importance to be identified before subtemporal transtentorial and retrosigmoid approaches for different neurosurgical reasons.