Objective To evaluate the applicative value of intra-operative laparoscopic ultrasonography( LUS) in laparoscopic partial nephrectomy( LPN) of centrally located para-hilus renal tumors. Methods Clinical date of 4 patients who underwent LPN for centrally located renal tumors with LUS in our hospital during March to July of 2014 were retrospectively analyzed. Two of the patients were operated through abdominal cavity and 2 were operated through retroperitoneum. Indicators such as operation time,blood loss,pat...