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Diagnostic criteria.
Increase in dimensions of pylorus: (1) Transversely > 4mm (2) Longitudinally > 16mm
On longitudinal axis the pyloric musculature which is hypoechoic looks thickened and its thickness measures 5.1 mm, and the length of the pyloric canal measures 16.1 mm. Cervix sign, Antral nipple sign and target sign can be well appreciated.