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THE PAEDIATRIC ABDOMEN 235<br />

A<br />

B<br />

C<br />

D<br />

Figure 9.14 Hypertrophic pyloric stenosis.<br />

(A) Normal pylorus demonstrating measurement of length<br />

of pyloric canal and thickness of the muscle. (B) A few<br />

minutes later the pylorus relaxed and opened widely,<br />

excluding the diagnosis of hypertrophic pyloric stenosis.<br />

(C) Thickened and elongated pylorus of hypertrophic<br />

pyloric stenosis seen in longitudinal section. S represents<br />

a fluid-filled stomach. (D) TS view of the thickened<br />

pylorus. (E) Demonstrates the measurements of pyloric<br />

length, muscle thickness and pyloric width.<br />

E

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