Mineura K, Sasajima T, Kowada M, Ogawa T
Neurosurgical Service, Akita University School of Medicine.
Neurol Med Chir (Tokyo). 1992 Feb;32(2):104-6. doi: 10.2176/nmc.32.104.
A 41-year-old male developed radiation-induced bilateral cystic frontal lobe necroses after irradiation for an olfactory neuroblastoma. Computed tomography (CT) and magnetic resonance (MR) imaging revealed the lesions, one containing a fluid-blood level on CT scans and niveau formation on MR images. It was proved to be a coagulated hematoma within the cyst at surgery. Such a fluid-blood level in a radiation-induced cyst has never been reported, although hemorrhage frequently accompanies delayed radiation necrosis. Positron emission tomography with multiple tracers may be useful in differentiating cerebral radiation necrosis from tumor recurrence, because of absence of abnormal tracer accumulation.
一名41岁男性在接受嗅神经母细胞瘤放疗后发生放射性双侧额叶囊性坏死。计算机断层扫描（CT）和磁共振成像（MR）显示了这些病变，其中一个在CT扫描上有液-血平面，在MR图像上有液平形成。手术证实囊肿内为凝血性血肿。尽管出血常伴随延迟性放射性坏死，但放射性囊肿中的这种液-血平面此前从未有过报道。由于没有异常示踪剂积聚，使用多种示踪剂的正电子发射断层扫描可能有助于区分脑放射性坏死和肿瘤复发。
