Chapter 36

### 1. Enteric duplication cyst

###### Figure 36-1

Enteric duplication cyst.

Longitudinal sonographic imaging of the right upper quadrant of an infant shows an oval cyst just inferior to the liver margin. The wall consists of an outer hypoechoic layer (arrow) and in inner hyperechoic layer. This is the muscular rim sign or double wall sign. There are foci of echogenic debris adherent to the inner wall of the cyst.

### 2. Duplication cyst

###### Figure 36-2

Duplication cyst.

There is echogenic solid material (arrow), likely clotted blood, in the dependent portion of this duodenal duplication cyst. Fine echoes due to particulate debris floating in the cyst fluid are also present.

### 3. Tubular duplication of the small intestine

###### Figure 36-3

Tubular duplication of the small intestine.

99mTc scintigraphy (anterior image) demonstrates tortuous linear uptake in the mid and lower portions of the abdomen (arrows). There is normal accumulation in the stomach wall and bladder lumen.

### 4. Duplication cyst

###### Figure 36-4

Duplication cyst.

An enhancing, well-defined wall (arrow) surrounds this duplication cyst of the ileum. There is no air or ingested contrast within the cyst lumen.

### 5. Duodenal duplication cyst

###### Figure 36-5

Duodenal duplication cyst.

A. A coronal MRCP image of a 6-day-old infant shows a large upper abdominal cyst (C). There is no bile duct dilation. A normal gallbladder (arrow) is present superior to the cyst. B. The cyst (C) is hyperintense on this T2-weighted axial image. The gallbladder (arrow) and liver are normal in appearance. The stomach is located to the leftof the cyst. There are small hyperintense cysts in the superior aspects of the kidneys. C. There is faint echogenic debris within the cyst (C) on this longitudinal sonographic image. The gallbladder (arrow) is normal.

### 6. Meckel diverticulum

###### Figure 36-6

Meckel diverticulum.

There is a focus of abnormal 99mTc accumulation in the lower abdomen (arrow) on this 30-minute anterior image of a 4-year-old child with hematochezia. Note normal activity in the stomach wall and bladder lumen.

### 7. Meckel diverticulum

###### Figure 36-7

Meckel diverticulum.

A. An anterior image obtained 5 minutes ...

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