Cystic hypodense foci are a kind of imaging description. During imaging examinations such as ultrasound or CT, cystic hypodense foci can be found in the liver or kidneys, etc. Such cystic hypodense foci indicate that this lesion is cystic and there is fluid inside, often called liver cysts, kidney cysts, etc. Generally, no special treatment is needed, there is no special symptom, and no special treatment is needed in the case of less than 5 cm. If it increases and there are symptoms of pressure need to do surgery, you can do cyst aspiration, that is, cyst puncture and drainage or consider surgery, the effect is very good, this is a very common benign lesion, do not worry.