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Doctor insights on: Exophytic Cyst Kidney

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What does it mean to have complex exophytic cyst in kidney?

What does it mean to have complex exophytic cyst in kidney?

It means that : The cyst is not empty and has complex material inside it. Kidney cancer has to be excluded by a ct scan with IV dye in cases of complex cyst. ...Read more

Dr. Edward Kim
Board Certified, Nephrology and Dialysis
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Cyst (Definition)

A cyst is a structure or mass that consists of a cellular lined sac. It is typically filled with fluid but may be filled with solid material. It can be congenital, traumatic, or acquired. They may develop nearly anywhere in the body and usually require complete excision for eradication or they are likely to recur. Fluid filled sacs that are not cellular lined ...Read more


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How serious is: exophytic T2 hyperintense renal lesion, 6cm x 7cm x 5cm? Kidney is 12cm length. US indicates simple cyst. Some discomfort in abdomen.

How serious is: exophytic T2 hyperintense renal lesion, 6cm x 7cm x 5cm?  Kidney is 12cm length. US indicates simple cyst. Some discomfort in abdomen.

Not serious: The kidney cyst is a round pouch of smooth, thin-walled tissue usually filled with fluid. Simple cysts are the most common type. They are not the same thing as polycystic kidney disease, which is progressive and can lead to kidney failure The size of these cysts may also increase with age. They usually do not cause symptoms. If found during an ultrasound or CAT scan they are frequently watched. If necessary they can be aspirated and the space filled with a solution that contains alcohol ...Read more

Dr. Edward Kim
Board Certified, Nephrology and Dialysis
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What is exophytic renal cysts? My husband has one that is measured 8mm. Could it be a precursor to kidney cancer?

What is exophytic renal cysts?  My husband has one that is measured 8mm. Could it be a precursor to kidney cancer?

Unlikely: Exophytic renal cysts are simply cysts that extend outside the kidney capsule. You can envision a "pimple" on the surface of the kidney. Endophytic cysts are those that are buried within the kidney cortex. The 8 mm cyst is very small and difficult to characterize on noncontrast imaging. However, such a small lesion without complex features is highly unlikely to be cancerous. May deserve followup. ...Read more

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I have a result of renal tract CT,,with 3cm exophytic mass arising from the upper pole of L kidney which looks like a cyst,,is this cancer??

I have a result of renal tract CT,,with 3cm exophytic mass arising from the upper pole of L kidney  which looks like a cyst,,is this cancer??

Maybe yes maybe no: If it's truly a cystic lesion and then I will be benign however there are cystic cancers of the kidney the more cystic component has the more likely it is benign let's hope it's a simple retention cyst with just fluid the ultrasound should help determine whether this is fluid maybe you should have a follow-up ultrasound after the CT scan ...Read more

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Can a simple kidney cyst change to a complex malignant cyst?

Can a simple kidney cyst change to a complex malignant cyst?

No.: Simple cysts are common and at your age 1 or 2 found in your kidneys are not worrisome. A simple cyst is not cancerous but if injury to that cyst leads to small bleeding within it, it can look "complex", meaning it is not easily distinguished from something more concerning such as cancer. These cysts warrant closer monitoring. Hope this helps! ...Read more

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What is the difference between a typical and simple kidney cyst? I have a typical simple cyst of 1 CM on left kidney. I 'm male 31 years...

What is the difference between a typical and simple kidney cyst? I have a typical simple cyst of 1 CM on left kidney. I 'm male 31 years...

Atypical v simple: Simple cyst is a sac that contains clear liquid. It is usually benign. Atypical means non-typical. The contents here are not clear. It may contain old blood, fatty tissues, or solid tissue. We worry about possibility of solid tissue because it may be cancerous; hence, the follow up ultrasound which is designed to detect growth in order to allow for prompt intervention if needed. ...Read more

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What are the chances of a bosniak iif kidney cyst changing over time into something worse? How quickly do they tend to change if they are going to?

What are the chances of a bosniak iif kidney cyst changing over time into something worse? How quickly do they tend to change if they are going to?

Unlikely: But best to continue to monitor - us is probably the best modality; no radiation risk/least expensive..... ...Read more

Kidney (Definition)

The kidneys are paired organs that lie on either side of the vertebral column. Part of their critical functions include the excretion of urine and removal of nitrogenous wastes products from the blood. They regulate acid-base, electrolyte, fluid balance and blood pressure. Through hormonal signals, the kidneys control the ...Read more


Dr. Chad Levitt
46 doctors shared insights

Kidney Cyst (Definition)

Kidney cysts are fluid filled sacs that form in the kidney. Most are simple cysts and harmless. Some may ...Read more


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Dr. Edward Kim
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