Method: Report a series of cases with 224 normal kidneys (from the Vietnamese cadaver adult inAnatomy Department Laboratory of the University of Medicine and Pharmacy of Ho Chi Minh Cityfrom 2003 to 2011 and from the donor cases in Cho Ray hospital from 2005 - 2009) and 399kidneys of UPJO patients having surgery in three hospitals (Children Hospital N 1, Cho Ray and Binh Dan hospitals) from 2005 to 2010.