Short discontinuity of right M1 segment.
Instead, there are several small vessels focally replacing the M1 segment giving a "rete mirabile like" like or twig-like appearance.
No pathology of the distal ICA and (not shown) no signs of pathological leptomeningeal or transdural anastomoses elsewhere (questioning the potential differential diagnosis of Moyamoya-Syndrome).
Young age, no risk factors and no further angiographic signs elsewhere questioning the presence of a unifocal acquired steno-occlusive lesion.