What Are Cystic Lesions?

[Etiology and pathology]

Splenic cystic lesions

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[Etiology and pathology]

Can be divided into three categories: splenic cysts: lined with endothelial cells, are congenital cysts. Pseudocysts of splenic cyst: The cyst wall is not covered by endothelial cells, most of which are caused by traumatic hematoma, infarction, or abscess absorption, which are more common, accounting for about 80% of splenic cysts. splenic hydatid cyst: often coexist with liver or lung hydatid cyst, more common in pastoral areas.

[Clinical manifestations]

Most do not cause symptoms, but when the cyst is larger, it can manifest as abdominal pain and abdominal mass.

[Imaging performance]

1. Ultrasound performance:

The spleen parenchyma showed a round or oval echo-free zone with clear edges, smooth capsule walls, and enhancement effects behind the posterior wall.

2.CT performance:

A plain or oval low-density area with water-like density can be seen in the plain scan. The realm is clear, sometimes it may occur frequently, and the cystic wall is sometimes calcified.

The wall of congenital cysts is thin and regular in appearance. The walls of pseudocysts may be slightly thicker and slightly irregular.

The splenic hydatid cyst often enlarges the spleen. Although the contents of the cyst cavity are also liquid, the CT value is slightly higher than the previous two types of cysts, which may be calcified. Like shadows, it is also possible to see ascites.

After the enhanced scan, the congenital cysts and pseudocysts themselves are not enhanced, and there is no enhancement of hydatid cysts, but when there are detached inner cysts and ascites, the cyst wall is enhanced.

[Differential diagnosis]

Need to identify with spleen abscess and spleen tuberculosis.