An unusual case of necrobiotic xanthogranuloma with IgG-λ monoclonal gammopathy presenting as cerebral manifestations - Li, Yiman; Chen, Fengxi; Cheng, Jie; Liang, Hongqin; Chen, Kang; Li, Jing; Wang, Jian; Cai, Ping; Zhu, Jiang; Lu, Hong; Li, Xiaoming (Quantitative Imaging in Medicine and Surgery, 2023)