Embolização pré-operatória: os 5 tumores e quando realmente vale

Is a hypervascular tumor an indication for embolization? And intense blush on angiography? In practice, the decision is usually made exactly like this: the tumor fills up a lot, so embolize it. But paraganglioma, angiofibroma, and meningioma are completely different realities—and in some cases, preoperative embolization adds risk without changing anything in the surgery. In this video, Dr. Igor Pagiola, a specialist in Interventional Neuroradiology, goes through each tumor and defines when preoperative embolization changes the outcome and when it is merely a routine procedure. The starting point is not the size of the lesion, but the origin of the blood supply: if the supply is predominantly from the external carotid artery, with catheterizable pedicles, you have a good candidate; if it is predominantly pial, comes from branches of the internal carotid artery, or depends on deep perforating veins, the benefit decreases and the risk increases. From there, the rule of thumb is to treat 60-70% of the blush safely, and discuss each case individually: paraganglioma (glomus tumor) with dominant supply from the ascending pharyngeal and occipital arteries, and care must be taken with anastomoses and branches of the lower cranial nerves; juvenile nasoangiofibroma, practically mandatory, and the limit of devascularization when there is intracranial extension with supply from the internal carotid artery; meningioma, where the real nuance lies between strong indication (large, skull base, dominant middle meningeal artery) and weak indication (small, convexity, pial supply); hypervascular metastasis of renal and thyroid carcinoma, where the surgical plan decides; and hemangioblastoma, where the threshold needs to be higher, not lower. It concludes with the timing—the 24- to 72-hour window—and with the question that resolves more than all the previous criteria. In this video you will learn: ✅ Why the determining factor is the origin of the arterial supply, not the size or blush of the tumor ✅ The 60-70% blush rule of thumb: when the procedure has real surgical impact and when you've only added a procedure ✅ Tumor by tumor: paraganglioma, juvenile nasoangiofibroma, meningioma, hypervascular metastasis, and hemangioblastoma — embolize, depend on, or require extra caution ✅ The dangerous territories: ascending pharyngeal anastomoses, branches of the lower cranial nerves, and pedicles that also irrigate cerebellar parenchyma and brainstem ✅ The correct timing: why the window is 24 to 72 hours and why the benefit disappears after 7 to 14 days ✅ The objective question the interventionalist should ask the neurosurgeon before accepting the indication Watch until the end to understand why preoperative embolization is a strategic tool and Not a ritual of service — and why the only question that matters in the end is: will this change the surgery or just the angiography? Chapters: 00:00 - Excessive swelling is not an indication 01:10 - Where does the blood come from? 02:30 - Paraganglioma: no discussion 03:50 - Angiofibroma: practically mandatory 05:10 - Meningioma: strong or weak? 06:40 - Metastasis and hemangioblastoma 08:20 - Timing and the final question 👍 Like if the content was helpful 💬 Comment on how the discussion of preoperative embolization goes in your service ✅ Subscribe to the channel so you don't miss the next videos