Pathology dictionary -

Cyst

Cyst wall
Inside of cyst

Pathologists use the words cyst to describe an abnormal open space surrounded by a thin wall of tissue. The space can be empty (filled with air) or it can be filled with another type of tissue such as blood, pus (dead immune cells), or skin.

Pathologists describe a cyst that has broken open as ruptured. A ruptured cyst may be surrounded by inflammatory cells and cholesterol clefts may be seen under the microscope.

 

Cysts that have only a single open space are called unilocular while those with multiple smaller spaces are called multilocular (the image above shows a multilocular cyst).

 

Cysts can start anywhere in the body. The most common locations are the ovaries and skin. Cysts can range in size from very small (only seen under the microscope) to very large (big enough to be seen without a microscope).

Cyst is a descriptive word which can be applied to many pathological situations. It is not a diagnosis in itself. In many cases, a cyst is a non-cancerous (benign) growth. However, cysts can also be seen in a cancer.

 

The prognosis for a patient with a cyst depends on the location of the cyst and the type of cells making the cyst. Your pathologist will examine the cyst under the microscope and provide this information in your pathology report.

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