<prompt> Which is Not true regarding Hypertrophic pyloric stenosis:Ultrasound is not useful for diagnosisUsually presents between 2-8 weeksCommon in malesDilated stomach with minimal gas  <response>: Ans. is a ie. US is not useful for diagnosis Option A is absolutely wrong statement as US is the inv. of choice for hypertrophic pyloric stenosis.Already explained in June, 2000. 