The Safe Use of Rituximab In The Management of ANCA-Associated Vasculitis In A Patient With Suspicious Renal Cyst – A Case Report

ANCA- Associated Vasculitis (AAV) is a multi-system immune small vessel vasculitis. The use of traditional immunosuppressive agents in the management of ANCA vasculitis is known to increase baseline susceptibility to malignancy [1]. Renal cyst is a commonly encountered incidental finding in clinical practice. Although most cysts found are benign, the identification of complex cysts warrants further diagnostic investigation to exclude a neoplastic process. To shed light on this complex area, the Bosniak system has provided a framework for the classification of cystic renal lesions. The system defines five categories of renal lesions based on radiological features seen on CT or MRI, to stratify the lesions associated risk of malignancy [2].