Objective:To decrease or delay the major un-wanted clinical consequences to improve the quality of life in the involved patients.Methods:A retrospective case series study has been made on the forty five pediatric patients admitted to nephrology department of Ali-Asghar Hospital during a period of nearly 10 years.The patients have been divided into two groups of good and poor prognoses according to their clinical outcomes.The routine laboratory records and clinical manifestations extracted and statistically analyzed as independent variables both by univariate and multivariate methods.Results:Forty three patients have been managed successfully with only two deaths occurred.According to clinical findings,nineteen patients were classified as poor prognosis and the rest were categorized as good prognosis.Multivariate statistical analyses showed that lesser age at the time of admission(age<46 months,P<0.015) and the higher initial WBC count(count>15 000,P<0.226) were well-interrelated to ominous clinical consequences like convulsion,coma and peritonitis and statistically different between the two groups of patients.Conclusion:Despite the importance of predictive variables in the course of Hemolytic uremic syndrome(HUS) in children and their critical influence on the clinical outcome,many aspects of these parameters have been remained to be elucidated comprehensively.Our study showed that simultaneous low age of child at the time of admission with simultaneous high WBC count will result in the poorer prognoses of the patients.This may warn the clinicians to provide more supportive cares for this group of patients. Objective: To decrease or delay the major un-wanted clinical consequences to improve the quality of life in the involved patients. Methods: A retrospective case series study has been made on the forty five pediatric patients admitted to nephrology department of Ali-Asghar Hospital during a period of nearly 10 years.The patients have been divided into two groups of good and poor prognoses according to their clinical outcomess.The routine laboratory records and clinical manifestations extracted and sustained analysis as independent variables both by univariate and multivariate methods. Results: Forty three patients have been managed successfully with only two deaths occurred. According to clinical findings, nineteen patients were classified as poor prognosis and the rest were categorized as good prognosis. Multivariate statistical analyzes showed that lesser age at the time of admission (age <46 months , P <0.015) and the higher initial WBC count (count> 15 000, P <0.226) were well-interrelated to omi nous clinical consequences like convulsion, coma and peritonitis and flora different between the two groups of patients. Conflusion: Despite the importance of predictive variables in the course of Hemolytic uremic syndrome (HUS) in children and their critical influence on the clinical outcome, many aspects of these parameters have been kept to be elucidated comprehensively. Our study showed that simultaneous low age of child at the time of admission with simultaneous high WBC count will result in the poorer prognoses of the patients. This may warn the clinicians to provide more supportive cares for this group of patients.