Topics: Simple Cysts, Complex Cysts, Renal Cell Carcinoma, Autosomal recessive polycystic kidney disease (ARPCKD), Autosomal Dominant polycystic kidney disease (ADPCKD). Simple Cysts Presentation: Small cyst found on asymptomatic screen i.e. incidental cyst. No loculations or septations. Diagnosis: no further testing required Treatment: no treatment required Complex Cysts Presentation: Can also be found on asymtomatic screen, and will have septations and loculations. However, may present similar to a kidney stone (flank pain and hematuria) or similar to renal cell carcinoma (flank mass, flank pain, hematuria), or with pyelonephritis (when cyst becomes infected). Diagnosis: Because of the way it presents, a urinalysis and CT scan will usually be done. If pregnant or…