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NK939 is an investigational hemostatic embolic agent developed by Nippon Kayaku Co., Ltd. for the treatment of hypervascular tumors and arteriovenous malformations (AVMs). Administered via intra-arterial injection, NK939 functions by physically occluding the blood vessels that supply the target lesion. This mechanical blockage induces localized ischemia and subsequent necrosis in tumors or stabilizes blood flow in vascular malformations. It is currently being evaluated in Phase 2 clinical trials in Japan as a localized interventional therapy for these conditions.
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