We conducted a prospective evaluation of 301 consecutive renal transplants to define the prevalence and therapy of lymphoceles following renal transplantation. Using a management scheme, we identified in 52 patients (17.3%) perirenal fluid collections. Using this management scheme, we treated 47/52 patients conservatively. Only 5 (1.7%) patients required internal marsupialization. We conclude that groin lympho cysts after renal transplantation can be successfully treated with conservative methods.