BACKGROUND We report a rare case of sudden bilateral vision loss due to third ventricular cavernous angioma with intratumoral hemorrhage. CASE PRESENTATION A 45-year-old woman presented decreased visual acuity in both eyes. Her best corrected visual acuity was 0.1 in the right eye and 0.15 in the left eye. Goldmann perimetry showed bilateral central scotomas and bitemporal visual field defects. MRI demonstrated a lesion with mixed hypo- and hyperintensity at the optic chiasm, which was thought to be an intratumoral hemorrhage. The patient underwent bifrontal craniotomy. The tumor was exposed via an anterior interhemispheric approach, and histological evaluation of the mass led to a diagnosis of cavernous angioma. Six months after the surgery, her best corrected visual acuity was 0.9 in the right eye and 0.9 in the left, with slight bitemporal visual field defects. CONCLUSION Third ventricular cavernous angioma is considered in the differential diagnosis of chiasmal syndrome. Contrast-enhanced MRI and FDG-PET might be useful for differential diagnosis of cavernous angioma from other chiasmal tumors including glioblastoma.

中文翻译：

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由于第三脑室海绵状血管瘤伴肿瘤内出血而导致的突然双侧视力丧失-病例报告。

背景我们报道了一种罕见的病例，该病例因第三脑室海绵状血管瘤伴肿瘤内出血而导致突然的双侧视力丧失。病例介绍一名45岁的女性双眼视力下降。她的最佳矫正视力在右眼为0.1，在左眼为0.15。Goldmann视野检查法显示双侧中央性癫痫和双眼视野缺损。MRI显示视神经a混合有低强度和高强度的病变，被认为是肿瘤内出血。该患者进行了双额颅骨开颅手术。通过前半球间入路暴露肿瘤，对该肿块进行组织学评估可诊断为海绵状血管瘤。手术六个月后，她的最佳矫正视力在右眼为0.9，在左眼为0.9，具有轻微的时空视野缺陷。结论第三脑室海绵状血管瘤被认为可鉴别为Chiasmal综合征。对比增强的MRI和FDG-PET可能有助于鉴别诊断包括胶质母细胞瘤在内的其他chiasmal肿瘤的海绵状血管瘤。