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If it is a simple cyst, probably not. There are characteristics that would make it concerning and that are often graded using something called the Bosniak scale.
A proteinaceous cyst of the kidney is also known as a renal cyst. The cyst will have hemorrhagic fluid as well as lesions on the kidney.
Nephrorrhaphy of right kidney wound
A small benign cyst, with no growth over time, would not be an abnormal finding. In contrast, a malignant cyst would pose an abnormal and concerning problem, potentially requiring a rapid medical response.
Simple kidney cysts are common and not dangerous. They usually do not require treatment. If the get infected, burst, or cause a urinary blockage, a cyst can become dangerous and require treatment.
it might be a cyst or a mass
Something that was most likely there before your surgery... It's nothing to worry about, if that is what it is...
First hypothesis: a cyst.
A T2 hyperintense right renal lesion is a mass found on the right kidney. It could be a simple cyst or indicative of a tumor.
A renal cyst is a collection of fluid in the kidney. Kidney cysts can be benign but some are more serious and can actually impair kidney function.
NEPHRO, NEPHR - it means something related to the kidneys
A hypodense area simply means the area is "less dense" than surrounding structures. This can be a cyst or any number of things.