4 mm* Cervix sign - Pyloric length (segment length) - > 16 mm* Antral nipple sign - Pyloric diameter - > 15 mm12.Bone within a Bone appearance seen in * Normal neonate* Growth arrest/recovery lines* Bisphosphonate therapy* Sickle cell anemia* Osteopetrosis* Acromegaly* Prostaglandin El therapy* Heavy-metal (eg lead) poisoning* Hypothyroidism/Hypoparathyroidism* Hypercalcemia & Hypervitaminosis-D* Rickets/Osteomalacia (Healed phase)* Scurvy (Healed phase)">