Fig. 1

Patient 1. 24 years old man with double renal artery and urinary stones causing right pielectasia, treated with nephrostomy. a arterial phase CT scan reconstruction in coronal plane showing intracaliceal active bleeding (black circle); b DSA performed from the cranial renal artery showing no angiographic bleeding signs, previous CT contrast agent mixed with clots is appreciable in the calixs (black asterisks); c DSA performed from the caudal renal artery showing extraluminal blush (black asterisk) from the interlobar branch of the inferoanterior segmental artery; d superselective lobar microcatheterization confirming bleeding (black asterisk); e superselective embolization with MVP 3Q (white arrows indicate distal and proximal radiopaque markers of the MVP, white dotted arrow indicates the pusher wire radiopaque extremity after detachment, black dotted arrow indicates the 2.7Fr Progreat microcatheter, black arrow indicates the 5Fr diagnostic Cobra 1 catheter); f final DSA control showing no more angiographic bleeding (black shadow indicates the ischemic area, white arrows indicate distal and proximal radiopaque markers of the MVP)