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Doctor insights on: Can A Benign Complex Cyst Of The Kidney Turn Cancerous

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How likely is it for a calcified cyst in the kidney to become cancerous?

How likely is it for a calcified cyst in the kidney to become cancerous?

Stop worrying: This may be a little atherosclerotic aneurysm or a real epithelial cyst or calyceal diverticulum that's undergone dystrophic calcification. Unless the radiologist has expressed concern, I'd forget about it. Cancers arise from situations in which there's honest-to-goodness genetic damage and/or massive cell turnover. Neither's happening in a calcified cyst. ...Read more

Dr. Barry Rosen
4,344 Doctors shared insights

Cancer (Definition)

Cancer is a group of diseases that is characterized by uncontrolled cell growth leading to invasion of surrounding tissues that spread to other parts of the body. Cancer can begin anywhere in the body and is usually related to one or more genetic mutations that allow normal cells to become malignant by interfering with internal cellular control mechanisms, such as programmed cell death or by preventing ...Read more


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I have a renal lower poll cyst on my kidney and I want to know if it is always cancerous what are the symptoms of the cyst

I have a renal lower poll cyst on my kidney and I want to know if it is always cancerous what are the symptoms of the cyst

A: A cyst in the kidney is not always cancer. In fact most renal cysts are benign and not cancerous. Most people with renal cysts have no symptoms. Hope that info helps. ...Read more

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What are the signs that complex kidney cyst is cancer?

What are the signs that complex kidney cyst is cancer?

Multiple features: Complex cysts, vs. Simple cysts, share common walls with other cysts, have solid components in the walls, or calcifications.

The radiologist will opine if features look suspicious and either recommend a repeat ultrasound in 6 months, or a ct to further clarify. ...Read more

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If bosniak iif complex kidney cysts have a risk of being cancerous (up to 25%?) then why don't dr's remove it right away? Couldn't the cancer spread?

If bosniak iif complex kidney cysts have a risk of being cancerous (up to 25%?) then why don't dr's remove it right away? Couldn't the cancer spread?

Not neccessary.: Bosniak iif cysts have low risk of progression, and can be stable up to more than 5 years without neoplasm progression, thus can be safely monitored. Retrospective study showed no patients developed locally advanced or metastatic disease from a bosniak iif. ...Read more

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If a 1cm complex kidney cyst has been stable in size for 4 months, what are the chances it is cancer and is it possible for it to spread at this size?

If a 1cm complex kidney cyst has been stable in size for 4 months, what are the chances it is cancer and is it possible for it to spread at this size?

Renal cyst: The fact that it is small and stable after 4 months is a good sign. However another renal ultrasound should be done in 6 months to look for growth or change in structure. There is an increased risk of malignancy with a complex cyst and it should be watched closely ...Read more

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Left kidney cysts, 1-4cm & 1-1.5 cm. Mid pole. Should I see specialist and can they be cancerous?

Left kidney cysts, 1-4cm & 1-1.5 cm. Mid pole. Should I see specialist and can they be cancerous?

Usually not: Most of us adults have kidney cysts and they are usually benign. There are certain characteristics on the scan which can make us more suspicious for cancer and require further testing. Radiologists are very good at picking those up. Usually for benign cysts, we just recheck them in 3-12 months to make sure they are not growing. ...Read more

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I had bladder cancer 10 yrs ago. Simple cyst in left kidney was 3mm, now 8mm and read as complex. What is the probability of malignancy?

I had bladder cancer 10 yrs ago. Simple cyst in left kidney was 3mm, now 8mm and read as complex. What is the probability of malignancy?

Possible.: Difficult to give you probability statistics in this setting, but any complex cyst requires close monitoring. With your history of bladder cancer, though, I encourage you to follow up with your urologist for his/her opinion. Malignancy unfortunately is not out of the question, but would be much easier to manage sooner rather than waiting until later. Best of luck to you. ...Read more

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High attenuation cyst on kidney, approximately 3cm. Erthryopoietin elevated and WBC, RBC and hemaocrit elevated though not drastically. Cancer?

High attenuation cyst on kidney, approximately 3cm. Erthryopoietin elevated and WBC, RBC and hemaocrit elevated though not drastically. Cancer?

Bright cyst on ct: Usually a high attenuating cyst means the cyst is bright on a CT scan. While malignancy is in the differential diagnosis there are benign causes as well, such as a hemorrhagic cyst (a cyst with blood in it). Usually such findings are followed up with additional imaging studies for better characterization and interval growth before proceeding to biopsy or resection. ...Read more

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Can there be a cyst and a exophytic solid mass lesion on a kidney? Are the thge same? Does the solid mass indicate cancer?

Can there be a cyst and a exophytic solid mass lesion on a kidney? Are the thge same? Does the solid mass indicate cancer?

Need followup: Renal cysts are common. The majority are benign. Cysts can also be assoicated with malignancies and some malignancies have cystic areas. A solid exophytic mass may be more worrisome.
YOu need a further workup and you may need a biopsy or surrgical resection to know for sure. Discuss imaging and surgical options with your doctors. ...Read more

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Is 776ggt level cancer levels in liver? Swollen spleen n cyst n left kidney...which of these is the most dangerous and should be treated first?

Is 776ggt level cancer levels in liver? Swollen spleen n cyst n left kidney...which of these is the most dangerous and should be treated first?

Depends.: In order to make a good judgment here, we would need to see the actual lab test results and the ultrasound or CT scan results. If you would like to consult us on Healthtap Prime, one of us can try to help you. Good luck. ...Read more

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What is a t1 htperintense right lower pole renal lesion most likely 1cm complex cyst scanhave repeat 6mths. Kidney cancer runs family Could be cancer?

What is a t1 htperintense right lower pole renal lesion most likely 1cm complex cyst scanhave repeat 6mths. Kidney cancer runs family Could be cancer?

Cyst in kidney: Right now the 1 cm cyst looks pretty small and benign. However it could turn into something solid or can get larger. 6 months is a good time to repeat it. If it looks the same in 6 months then it probably is not malignant or even if it is a cancer, it probably is slow growing and less likely to be aggressive. ...Read more

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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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Child has elevated AST liver enzyme (1st test 58, 2nd test 43). Dr says no worry. Also has complex kidney cyst. Is it a sign of cancer spread 2 liver?

Child has elevated AST liver enzyme (1st test 58, 2nd test 43). Dr says no worry. Also has complex kidney cyst. Is it a sign of cancer spread 2 liver?

Return To Doctor: Child's age/details of Kidney disorder unknown. Liver enzymes (AST, ALT) elevate with liver cell damage however AST elevations can also come from anomalies in other organs, (eg. Heart, kidneys & more) & does not point specifically to liver. Your child's AST's are very mildly elevated. With so little info given, suggest you see doctor to discuss cancer fears & to better understand child's condition ...Read more

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Hav a cyst near uterus n kidney. Now removing uterus and bladder. What wil b the real reason for this surgery? Is it cz of any kind of cancer?

Hav a cyst near uterus n kidney. Now removing uterus and bladder. What wil b the real reason for this surgery? Is it cz of any kind of cancer?

Unclear: Your question states that the doctors are removing your uterus, which can be normal. Your question also states that they are removing your bladder. It is not normal to remove someone's bladder. If you had cancer they should have told you that by now. It sounds like you could benefit from greater clarification from your doctors as to why they are performing these procedures. ...Read more

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4 year old with swollen lymph nodes on belly for over 2 months and also cyst in kidney. No viral illness. Can it be cancer?

Chances are low: Are the lymph nodes inside- or down in the groin- both are found in virus infections. Did you find out about the cysts with a CT scan? Usually if there is any concern for cancer the doctors will tell you to get further testing
One good thing is that if this is going on for 2 months and not causing weight loss or fever then it is less likely cancer- I would recommend talking with your doctor ...Read more

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Ct of kidneys, MRI and plain xray of lumb spine, all normal. Still have low back pain. On initial pl xray 2.4x2.1mm cyst was on rt ovary. Cld be cancer?

Ct of kidneys, MRI and plain xray of lumb spine, all normal. Still have low back pain. On initial pl xray 2.4x2.1mm cyst was on rt ovary. Cld be cancer?

Unlikely: Cancer is pretty low down the list of possibilities. The ovarian cyst is a common and normal finding and it is really unlikely that it has anything to do with your low back pain. Low back pain is a very nonspecific symptom with numerous causes, so it may take a while to figure it out. ...Read more

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2 months ago I found out I had a right ovarian cyst @ ER I'm still having sharp pains lower back pains leg pains and headaches could it b cancerous?

2 months ago I found out I had a right ovarian cyst @ ER I'm still having sharp pains lower back pains leg pains and headaches could it b cancerous?

Unlikely.: Some cysts, like serous cystadenomas are precursors of cancers. Any cyst the persists for more than 2-3 menstrual periods should be checked further, particularly in those who have a history of ovarian cancer. You are young to think of such possibillities, but your pain is likely from your cyst, which can get filled with blood. You also could have painful endometriosis. Get it removed asap. ...Read more

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I have extreme pelvic, stomach and lower back pain with cyst on my ovaries and a cystic mass in my uterus. I have spotty bleeding, bleeding with sex, and nausea that has gotten worse over the last month. I was just treated for stage 2 breast cancer. Ar

I have extreme pelvic, stomach and lower back pain with cyst on my ovaries and a cystic mass in my uterus. I have spotty bleeding, bleeding with sex, and nausea that has gotten worse over the last month. I was just treated for stage 2 breast cancer. Ar

Complicated: How were you treated for breast cancer? If you had a cyst and you have an increase in symptoms, I would recommend a repeat ultrasound to evaluate the cyst (which can cause nausea). As far as the bleeding symptoms, I would be concerned about an endometrial polyp especially is your treatment included tamoxifen. Consult a physician. ...Read more

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Benign cyst at kidney 3.8mm?

Benign cyst at kidney 3.8mm?

Cyst: Solitary ad small. Shouldn't need to worry. ...Read more

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Can a very large (6.5) *benign* right side kidney cyst- later cause pain or any symptoms for concern?

Can a very large (6.5) *benign* right side kidney cyst- later cause pain or any symptoms for concern?

Renal cyst: What wa stage cyst size, was in mm or cms. Either way a small cyst. Most of these don't cause issue. ...Read more

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Possible for very small benign liver and kidney cysts to have grown over the course of a year and a half??

Possible for very small benign liver and kidney cysts to have grown over the course of a year and a half??

Cysts: Since you know you have them, I assume you have had an ultrasound or CT scan.
Yes they could have gotten bigger or even multiplied.
Repeat scanning is indicated for follow up.
Your primary care physician should be able to order an ultrasound unless you are seeing an Urologist for the renal cysts or Gastroenterologist for the liver cysts.
But YOU do need a follow up exam! ...Read more

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What dangers do a growing, benign kidney cyst present? Could removal cause a stone? Currently at 2.3cm (as of March 2014)

What dangers do a growing, benign kidney cyst present? Could removal cause a stone? Currently at 2.3cm (as of March 2014)

Few: Assuming that a qualified radiologist or urologist has determined that you have a simple renal cyst, there is certainly no need to treat this surgically. Simple cysts are not associated with renal cancer or renal stones. Cysts that do not meet the criteria of a simple cyst need observation but rarely intervention. ...Read more

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I been diagnosed with a benign 3.5cm cortical cyst identified in my upper pole of my left kidney. Is this normal? What possible treatment that I can use

I been diagnosed with a benign 3.5cm cortical cyst identified in my upper pole of my left kidney. Is this normal? What possible treatment that I can use

See below: As suggested, it is benign, not likely to cause any problems, or cause symptoms. There are no definite recommendations in literature about monitoring this cyst. ...Read more

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I medium size mass & 3 smaller in liver & 1 medium size mass on left kidney what benign conditions? Biopsies will be done next week dr says not cyst

I medium size mass & 3 smaller in liver & 1 medium size mass on left kidney what benign conditions? Biopsies will be done next week dr says not cyst

Liver mass: The best thing to do is to wait for the biopsy.
to provide you a possible diagnosis one needs to know more about mass, like is it solid, is it echogenic? Was the imaging done with contrast, so on and so forth. ...Read more

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I had a renal ultrasound and a large benign cyst was found on my upper left kidney. Is this something to worry about and is there treatment for this?

I had a renal ultrasound and a large benign cyst was found on my upper left kidney. Is this something to worry about and is there treatment for this?

Don't worry: Simle beign renal cyst can reliably by diagnosed by a good ultrasound examination. Inner outine of cyst wall is smooth and regular, should have no sepations or irregularities. No indication for anything else other than repeat us in 6 months. 30% of adult population have benign renal cysts of various sizes. Only indication for treatment would be pain or tenderness overlying kidney. ...Read more

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


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