Pregnancy complicated by Castleman disease: a rare case report and review of literatureMan Zhang1,2, Mengjie Gao1,2, Yufeng Wu1,2, Jianhong Liu1,2, Xiaowei Chen1,2, Hongyu Jin1,21Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China2Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of EducationCorresponding author: Dr. Hongyu Jin, Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China. Email: jinhongyu324@icloud.com.