text: What are the imaging manifestations of renal carcinoma?\nOn CT: \nHypodense \nCystic \nCalcified mass \n\nhttp://www.meddean.luc.edu/Lumen/meded/Radio/curriculum/Surgery/renal_cancer_list.htm\n\nCystic nephroma typically presents as a painless abdominal mass without systemic symptoms. The appearance on CT is a multiloculated cystic mass; the septa usually do not enhance and are sometimes calcified (10%). \n\nhttp://brighamrad.harvard.edu/Cases/bwh/hcache/385/full.html\n\nCystic masses can calcify:\n\n"To determine whether the presence of calcifications in cystic renal masses is important in diagnosis and to suggest an approach to the management of calcified cystic renal masses."\n\nhttp://radiology.rsnajnls.org/cgi/content/full/226/1/47