Endovascular biopsy of an isolated sigmoid sinus intravenous lesion with newer-generation stent retriever: illustrative case

Endovascular biopsy using a stent retriever offers a safe, minimally invasive alternative to open surgical biopsy for intrasinus lesions. This technique is especially valuable in anatomically complex or high-risk locations where traditional approaches carry substantial morbidity. The use of newer-generation stent retrievers with integrated mesh structures may enhance tissue acquisition and diagnostic yield, guiding appropriate management in cases of isolated venous sinus lesions. https://thejns.org/doi/10.3171/CASE25456.