<s>[INST] my husband has ca prostrate and recently he had a episode of urine block with severe abdominal pain......they took out the urine by tempary catheter and he is fine now....they sent the urine or routine and culture test ..the culture test says no growth...however in the routine it says RBC's plenty and granular cast present...would like to know what does it mean [/INST] Because of retention, casts may have shown. nothing to worry. If there is retention again then an indwelling catheter (foley's) will help.Ask your oncologist to advise for shrinking of prostate depending on stage of CA.modern surgery, Ablationby laser are possible if not very advanced. Also chemotherapy helps. </s>