Intraoperative Visualization of Bilateral Thrombosis in the Posterior Inferior Cerebellar Artery Apparent in the Telovelomedullary Segment
Figure 2
(a) Intraoperative photograph, showing readily visible bilateral PICAs, after the removal of the tonsils. The arteries were pulseless, rigid, and dark. A seemingly calcified thrombus was visible in left PICA (arrow). The right thrombosed PICA was bluish (double arrow). C indicates cottonoid placed over the remaining occipital bone; C1: remaining parts of the C1 arch; Cr: cranial; Ca: caudal; L: left; R: right; S: suction. (b) Schematic drawing of the PICA. C indicates cerebellum; CaL: caudal loop of the PICA; CrL: cranial loop of the PICA; Hb: hemispheric branch; T: cerebellar tonsils, Ts: telovelomedullary segment; V: vermis; VA: vertebral artery; Vb: vermian branches.
