Medicine Kidney 35ec8322 RBC casts are found in - A DM B Wegeners Granulomatosis C SEE D Ankylosing spondylitis High-Yield Explanation One of the component of Wegener's granulomatosis is focal or diffuse necrotising glomerulonephritis , which is the reason for the presence of RBC casts. Ref Harrison20th edition pg 2122