Cystatin C as A Prognostic Biomarker to Monitor Renal Function in Liver Cirrhosis: A Narrative Review Nabeelah Ismail*, Faraaz Ismail, Afreen Ali, Ali Demyati, Ammara Syed, Hana Musthafa, Miryam Isac, Mohammed Al-Hamadani, Ofaira Nehal, Vaishnavi Upadhayaya, and Iman Mohamoud Abstract Cystatin C (CysC) is a serum protein that has been