An 83-year-old woman with type 2 diabetes mellitus presented with a 6-month history of painful rash. Physical examination findings are shown. The glycated hemoglobin level was 9.1% (reference value, <5.8), which had increased from a level of 6.6% measured 4 months earlier. What is the most likely diagnosis?
一名患有 2 型糖尿病的 83 岁女性患者,因6 个月的疼痛性皮疹病史就诊。体格检查所见如图所示(注:此处指原题附带的图片)。糖化血红蛋白水平为 9.1%(参考值 <5.8%),较 4 个月前测得的 6.6% 有所升高。最可能的诊断是什么?

A. Acquired acrodermatitis enteropathica获得性肠病性肢端皮炎
B. Necrolytic acral erythema坏死松解性肢端红斑
C. Necrolytic migratory erythema坏死松解性游走性红斑
D. Staphylococcal scalded skin syndrome葡萄球菌烫伤样皮肤综合征
E. Stevens-Johnson syndrome史蒂文斯-约翰逊综合征
答案解析:
坏死松解性游走性红斑(Necrolytic migratory erythema)见于大多数胰高血糖素瘤患者,据认为其发病机制是由胰高血糖素诱导的分解代谢所致,这种代谢异常会导致氨基酸缺乏、锌耗竭,进而引起表皮坏死松解。该患者首先接受了腹部计算机断层扫描(CT),结果显示胰腺尾部有一肿物。对该肿物活检样本的组织病理学分析符合神经内分泌肿瘤的表现。免疫组化染色显示胰高血糖素呈阳性,皮肤活检进一步证实了诊断。
正确答案:C
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