A patient had bilateral leg edema, insomnia, myalgias, paresthesias in the fingertips, lighter pigmentation of the facial skin compared with other areas of the body, proteinuria, and an elevated creatinine level. What is the diagnosis and what would you do next?

中文翻译：

---

患有蛋白尿、肌痛和面部皮肤色素沉着减少的患者


一名患者出现双侧腿部水肿、失眠、肌痛、指尖感觉异常、面部皮肤色素沉着较身体其他部位较浅、蛋白尿和肌酐水平升高。诊断是什么？接下来你会做什么？