Bosniak renal cyst (hemorrhagic cyst) - type II

Discussion:

When facing such a lesion, the question which needs to be answered is whether this lesion is surgical or not. A study has suggested that a homogeneous mass measuring 70 HU or greater at unenhanced CT has a greater than 99.9% chance of representing a high-attenuation renal cyst. This is classified as a Bosniak type 2 cyst.

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