我们报告了一例早老性痴呆的尸检病例,显示神经病理学上丰富的神经原纤维缠结(NFT),没有老年斑(仅缠结痴呆)。一名日本妇女在60岁时出现了记忆障碍。在65岁时,她的理解能力下降,兴奋和徘徊表现出来,但没有精神病症状,包括幻觉和妄想,也没有观察到性格的变化。患者在66岁时住院,头颅CT扫描显示双侧皮质中度萎缩和侧脑室中度增大,尤其是在下角。未检测到脑叶萎缩。她表现出口头倾向,并在最后阶段变得富有创造力,享年75岁。尸检显示她的大脑重850g,神经病理学研究显示大量NFT主要位于内嗅(跨嗅)区域,下膜,CA1-CA4,齿状回,杏仁核,丘脑底核,Meynert的基底核,黑质和蓝斑。在包括海马区的颞叶中注意到严重的神经元丢失和神经胶质增生。在任何大脑区域均未检测到老年斑。最近有一些报道称,NFT丰富的患者主要受累于同种皮质,但没有或很少有老年斑。报告病例中的所有患者在发病时都是非常年长的(80岁以上)。在我们的案例中,发病前期,我们可以排除任何其他疾病,通常与NFT一起出现,根据我们的知识,这是有关缠结的老年痴呆症的首次报道。
We report an autopsied
case of presenile dementia showing neuropathologically abundant neurofibrillary tangles(NFT) without senile plaques(tangle only dementia). A Japanese woman developed memory disturbance when she was 60 years old. At age of 65, her ability to understand deteriorated and euphoria and wandering manifested but neither psychotic symptoms, including hallucination and delusion nor a change in character were observed. The patient was hospitalized at age 66 and a cranial CT scan revealed bilateral moderate atrophy of the cortex and moderate enlargement of the lateral ventricle, especially in the inferior horn. No lobar atrophy was detected. She exhibited an oral tendency and became appallic at her final stage and died at the age of 75. Autopsy showed that her brain weighed 850 g and neuropathological study showed numerous NFT mainly in the entorhinal (trans-entorhinal) region, subiculum, CA1-CA4, dentate gyrus, amygdara, subthalamic nucleus, basal nucleus of Meynert, substantia nigra and locus coeruleus. Severe neuronal loss with gliosis was noted in the temporal lobes including the hippocampal region. No senile plaque was detected in any of the brain regions. There have been some recent
reports of patients with abundant NFT with the predominant involvement of the allocortex but no or very little senile plaque. All the patients in the reported cases were very elderly at onset(over 80 years of age). In our
case, the onset was presenile and we could exclude any other diseases, that usually present with NFT, and to our knowledge, this is the first report of a presenile dementia with tangles.