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Doctor insights on: Renal Ct Scan With Contrast

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Is there a lot of radiation associated with a CT scan with contrast for the renal area? Can the contrast cause an allergic reaction?

Is there a lot of radiation associated with a CT scan with contrast for the renal area? Can the contrast cause an allergic reaction?

No: CT of abdomen is a fairly routine test and not considered a radiation danger. Th incidence of allergic reaction to contrast is 1-3% with non-ionic agents and 4-12% with ionic contrast agents. Non-contrast agents are the type generally used today. The benefit from the diagnostic value of the test far exceeds the risk of these 2 issues. Hope this answers your question. ...Read more

Dr. Cornelius O'leary jr
1 Doctor shared a insight

Computed Tomography (Definition)

Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! The image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more


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What is a hyperdense renal cyst on a non contrast CT scan? No contrast because creatinine 1.49.

What is a hyperdense renal cyst on a non contrast CT scan? No contrast because creatinine 1.49.

Hyperdense cyst: On noncontrast CT scans, most simple kidney cysts look very dark or hypodense because the fluid inside of them is just like water. A hyperdense cyst looks much lighter or brighter compared to the kidney itself. This usually just means that there is high protein in the cyst or that the cyst has bled at some point. ...Read more

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What is a hyperdense renal cyst on a non-contrast CT scan? Contrast not give b.c. creatinine 1.49.

What is a hyperdense renal cyst on a non-contrast CT scan? Contrast not give b.c. creatinine 1.49.

Protein: Hyperdense cysts can be associated with higher amounts of protein which will increase density. Sometimes these cysts may have a little blood or fibrin that may increase density. Calcium in the wall of the cyst is easily seen and different from the other things ...Read more

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I read in articles that the dye used for a contrast abdominal/renal CT scan can cause many severe side effects including renal damage/failure. True?

I read in articles that the dye used for a contrast abdominal/renal CT scan can cause many severe side effects including renal damage/failure. True?

True: IV contrast can cause severe allergic reactions in some people, especially those allergic to iodine or shellfish. IV contrast is removed from the body by the kidneys. If one is dehydrated or has baseline kidney dysfunction, administration of contrast may worsen kidney function, leading to temporary or permanent kidney failure ...Read more

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My grandad's CT scan (abdomen with contrast) results says renal cell carcinoma. Should I be worried about this? :/

My grandad's CT scan (abdomen with contrast) results says renal cell carcinoma. Should I be worried about this? :/

Yes: CT scans are often the first test to reveal a malignant tumor in the kidney. See a urologist ASAP ...Read more

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What does it mean when a renal CT scan shows, thinning of the cortex, punctate calcification (with no stones), and contrast extending into the calyx.

What does it mean when a renal CT scan shows, thinning of the cortex, punctate calcification (with no stones), and contrast extending into the calyx.

Atrophy: Renal cortical thinning is seen due to functional loss of nephrons. There are many causes of "medical renal disease"which result in atrophy. Hypertension is the leading cause. Punctuate calcification s are very tiny stones. Contrast is supposed to be in the calyx, so I'm uncertain why that was stated. Was there anything else related to that statement? ...Read more

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Just had a ct scan done with contrast it showed left adrenal adenoma 1.7 cm. Small renal hypodensities left kidney. 1cmcomplex cyst left kidney should I be worried?

Just had a ct scan done with contrast it showed left adrenal adenoma 1.7 cm. Small renal hypodensities left kidney. 1cmcomplex cyst left kidney should I be worried?

Likely no, but..: What you report are largely seen incidental findings but a few loose ends here should be addressed to make sure there is nothing more insidious ie. How complex exactly is that left renal cyst? Also, an adrenal adenoma cannot be definitely diagnosis on a contrast enhanced scan unless a very specific protocol was followed. Feel free to schedule a consult and we can review your CT and the details. ...Read more

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Ct scan w/ contrast results say 1) renal parapelvic cysts & 2) defect right posterior diaphragm with herniation of fat into the right posterior costophrenic sulcus. What does this mean?

Ct scan w/ contrast results say 1) renal parapelvic cysts & 2) defect right posterior diaphragm with herniation of fat into the right posterior costophrenic sulcus. What does this mean?

Relatively common: The parapelvic renal cyst is a relatively common finding on routine urological examination but rarely needs treatment, unless it causes pyelonephritis, symptomatic renal stones or back discomfort. ...Read more

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Ct scan results (abdomen with contrast) say renal cell carcinoma and lesion mass. What should I do? (age 83years. Previously used to smoke heavily)

Ct scan results (abdomen with contrast) say renal cell carcinoma and lesion mass. What should I do? (age 83years. Previously used to smoke heavily)

Talk to oncologist: To make a plan that fits in with the way you want to live your life. There are many aggressive options, and there are alternative options. Make sure you discuss all your wishes with your family so they are all on the same page as you are. Good luck with everything, and best wishes! ...Read more

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What is bilateral renal excretion? Results reported on a CT scan.

What is bilateral renal excretion? Results reported on a CT scan.

Excretion is normal.: The kidneys excrete (produce, emit) urine under normal circumstances. When you have a CT scan, the contrast ('dye') you were given through your vein is excreted along with the urine from the blood stream. The 'dye' outlines your kidneys, ureters, and bladder (your 'plumbing') for the radiologist. To see. ...Read more

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My CT scan reported small left renal calculus! What could this mean? Kindly elaborate.

My CT scan reported small left renal calculus! What could this mean? Kindly elaborate.

Kidney stone: It may never cause problems or it might pass into the ureter at some point and cause pain and possibly some blood in the urine. ...Read more

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What does renal collecting systems are not appreciably dilated mean on a CT scan? Cause for concern?

Normal: This is a way of saying the part of the kidneys that collect and drain urine are normal. ...Read more

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USS July diagnosed 3.8 CM simple L renal cyst. Renal CT scan yesterday showed 3cm exophytic mass arising from L upper pole looks like a cyst?? CA

USS July diagnosed 3.8 CM simple L renal cyst. Renal CT scan yesterday showed 3cm exophytic mass arising from L upper pole looks like a cyst?? CA

Tissue is the issue: Hi. Diagnosis of what the renal mass is requires tissue for the pathologist to examine. Imaging studies may be suggestive or not, but to be certain, a pathologist must study a CT- or U/S-guided core biopsy of the mass. Sometimes surgical biopsy is necessary to determine whether benign or malignant. We don't have the means to make that determination. The mass may not be suspicious enough to biopsy ...Read more

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Ct scan false negative? 2012 renal US found 5mm solid lesion (likely aml). New US found bilateral lesions, avascular. 5mm now 7mm. New 1cm, CT normal

Ct scan false negative? 2012 renal US found 5mm solid lesion (likely aml). New US found bilateral lesions, avascular. 5mm now 7mm. New 1cm, CT normal

Renal cysts: Renal cysts are common in people over the age of 50, and are not significant. I don't know what AML stands for. A solid lesion needs a repeat study after a few months to show that it is not getting larger. You should review the CT report with your physician ...Read more

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M58, CT scan says "bilateral renal cortical cyst noted. The largest cyst at the upper pole of the left kidney measures 3.8x5 cm." Is this significiant?

M58, CT scan says "bilateral renal cortical cyst noted. The largest cyst at the upper pole of the left kidney measures 3.8x5 cm." Is this significiant?

Probably not: The majority of people develop a few kidney cysts, especially by the time we reach your age. They are usually benign. A kidney ultrasound would better characterize if it is a simple cyst (benign) or not, especially if there was no IV contrast in the CT scan. It should be noted how many cysts were found, which was not apparent in your description, so I'm only assuming one on each kidney. ...Read more

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Can I fly two days after doing a angio CT scan to the renal artery?

Can I fly two days after doing a angio CT scan to the renal artery?

CTA: CTA is noninvasive, the only issue is Kidney function, CTA need a decent dye load, if your kidney is stable post CTA, most patient can resume daily activity right away. This is based on the assumption, you only had a CTA and no intervention was done. If an intervention is done, you should D/W your MD. ...Read more

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Which is better at evaluating complex renal cysts in children - CT scan or mri? Is the bosniak scale used in children?

Which is better at evaluating complex renal cysts in children - CT scan or mri? Is the bosniak scale used in children?

Reasonable F/U...: Either one should be sufficient for evaluation after suspecting cystic lesion in kidneys of children, which can be categorized with bosniak system. After that, no further ct or MRI is needed but annual renal us in 1 yr for 1-2 times. If stable and asymptomatic with normal us, further study is usually unnecessary. Of course, beware of unwanted radiation to the children. ...Read more

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History of renal stones, pain in right side. CT scan clear. Blood test results clear except for low magnesium 0.79mmol/L. What does it mean?

History of renal stones, pain in right side. CT scan clear. Blood test results clear except for low magnesium 0.79mmol/L. What does it mean?

Magnesium: Low magnesium has been associated with calcium oxalate kidney stones. Magnesium can inhibit the formation of calcium oxalate in the urine. It can also reduce blood calcium oxalate levels. It has been shown that taking oral magnesium and vitamin B6, an inhibitor of calcium oxalate metabolism can decrease the incidence of stones. See a kidney specialist for a stone work up. ...Read more

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Pelvic CT scan showed mild dilation of the renal collection system bilaterally. No obstruction was seen on a retro-peritoneal u/s. Is this serious?

Pelvic CT scan showed mild dilation of the renal collection system bilaterally. No obstruction was seen on a retro-peritoneal u/s. Is this serious?

Not likely: The renal collecting systems collect the urine made by the kidneys. Urine then travels through the ureters to the bladder. If the collecting systems become dilated, it can mean there is something blocking the pathway (e.g., kidney stone, mass, scarring). There is a range of normal and even mild dilatation can be ok. Blood tests can also be used to ensure normal kidney function. ...Read more

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Ct scan showed 1.4x1.4 CM ill defined mass right hilum. Too small to biopsy? 2.5cmx1.5 CM lymph node between aorta and IVC below renal hilum. Concerns?

Lymph nodes: Difficult issue, from your description the larger node might be amenable to biopsy. Why are you having the CT performed? Short term follow up CT or other additional imaging should help ...Read more

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Ct scan conclusion: 11 mm calculus rt renal pelvis w fullness to the rt collecting system. What does this mean and what should I do? There is no pain

Kidney stone: On CT we use the cutoff of 5 mm for stones that can be treated conservatively. Stones larger than this need to be removed. The "fullness" means the urine isn't passing into the bladder and it is backing up, causing the drainage tube to dilate. ...Read more

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In my CT scan my renal vein is curled or lobed like roller coaster. Will it affect my filtration?

Renal vein: I don't think this will necessarily effect your filtration but as you get older it may have an effect on over all kidney function and blood pressure. Not much you can do about it but be aware that you have an anatomical abnormality. ...Read more

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My ct scan showed a renal cyst on my right kidney and I have protein in my urine what does this mean?

My ct scan showed a renal cyst on my right kidney and I have protein in my urine what does this mean?

Proteinuria: Hard to say without more information. Renal cysts are actually quite common and most of time not a cause for worry. Characteristics of the cyst as read by a radiologist are the best guide. Protein in the urine can also be normal in some situations. ...Read more

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I have a renal ultrasound in 2 weeks. Radiologist noted hydronephrosis on my CT scan from 12/26. Will this study confirm the CT result?

I have a renal ultrasound in 2 weeks. Radiologist noted hydronephrosis on my CT scan from 12/26. Will this study confirm the CT result?

Yes: Ct likely done for pain, possibly for a kidney stone which may or may not have passed. Us will show if hydronephrosis has resolved. This would be good management. Us not necessary to confirm ct diagnosed hydronephrosis if due to non-calculus (stone) obstruction like at upper ureter. Such obstruction would require a mag3 nuclear scan to quantify obstruction and need for possible corrective surgery. ...Read more

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32yrs fem with micro hematuria for more than 6yrs. Tests shows dismorpfism of the red cells means its renal. Is cystoscopy needed. Ct scan normal?

32yrs fem with micro hematuria for more than 6yrs. Tests shows dismorpfism of the red cells means its renal. Is cystoscopy needed. Ct scan normal?

Hematuria: Please go to a nephrologist. Microscopic hematuria can be caused by several factors, some very normal. You need a good urinalysis, microscopic analysis, CBC/metabolic panel, 24hr urine. A nephrologist can tell you if cystoscopy, biopsy, or more tests are needed. Consider switching SIngulair (montelukast). Family history of IgA nephropathy or Thallasemia? Read the link. Good luck.
http://tinyurl. Com/ztvs8n ...Read more

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I'm 20 yrs old and had a CT scan for a kidney stone and they found a incidental 11 mm interpolar left renal cortical cyst should I be worrried?

I'm 20 yrs old and had a CT scan for a kidney stone and they found a incidental 11 mm interpolar left renal cortical cyst should I be worrried?

No,: This is a very common incidental finding. A small renal cyst will generally cause no symptoms and require no treatment. ...Read more

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I'm 20 yrs old and had a CT scan for a kidney stone and they found a incidental 11 mm interpolar left renal cortical cyst should I be worrried?

I'm 20 yrs old and had a CT scan for a kidney stone and they found a incidental 11 mm interpolar left renal cortical cyst should I be worrried?

Renal Cyst: Renal cysts are very common, often benign and asymptotic fluid filled structures of the kidney's. Sometimes they can contain blood and can be difficult to better characterize on imaging. If they are only thin walled structures usually need no further work up, if they have solid portions may need follow up. ...Read more

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I'm 20 years old and had a CT scan for kidney stone and it showed a incidental 11 mm interpolar left renal cortical cyst no pain should I be worried?

I'm 20 years old and had a CT scan for kidney stone and it showed a incidental 11 mm interpolar left renal cortical cyst no pain should I be worried?

Renal Cysts: Renal cysts are benign fluid filled thin wall structures on the kidney that are commonly discovered when looking for something else on an imaging study. Rarely do they cause symptoms and if simple cysts are usually of no concern. ...Read more

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How many CT scans can I have in a 4-6 wk time span? I've had 2 chest, 2 head, 1 additional CT scan and abt to have 1 for renal artery and aorta w/cont

How many CT scans can I have in a 4-6 wk time span? I've had 2 chest, 2 head, 1 additional CT scan and abt to have 1 for renal artery and aorta w/cont

Risk vs Benefit: Be careful, and make sure there is good medical necessity before more tests using ionizing radiation. Ct carries the highest dose.

But, the risk of the current medical problem may easily outweigh the potential future risk.

Almost all data is from nuclear incidents with much higher radiation in 1 large dose. It is difficult to calculate risk at lower levels used in ct over weeks/months. ...Read more

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I'm 20 years old and had a CT scan for a kidney stone at the hospital and they found a incidental 11 mm interpolar left renal cortical cyst should I be?

I'm 20 years old and had a CT scan for a kidney stone at the hospital and they found a incidental 11 mm interpolar left renal cortical cyst should I be?

This is a: Common incidental finding. The vast majority of renal cysts never cause any symptoms or problems, and require no treatment. ...Read more

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Ct scan. Kidneys: Multiple parenchymal defects, presumably from remote infection or infraction. No renal masses or hydronephrosis. What does this mean? Scarring? Should I be concerned? Was in ER last night diagnosed with epiploic appendagit

Ct scan. Kidneys: Multiple parenchymal defects, presumably from remote infection or infraction. No renal masses or hydronephrosis. What does this mean? Scarring? Should I be concerned? Was in ER last night diagnosed with epiploic appendagit

Review these with Dr: The doctors have obligation to explain what the findings from the tests may mean to your concern, they are the best resource to get pertinent answer since s/he knows you more than anyone online. How? Follow suggestion in articles in http://formefirst. Com/onLifeBasics. Html. Best wish to health... ...Read more

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Am I at a higher risk I had an episide of gross hematuria saw 2 different uros all testing cam eback neg two cyystoscopies cytologues renal us CT urogram CT scan nothing was found to explain this. My question is am I now at a highher risk for possible bl

Am I at a higher risk I had an episide of gross hematuria saw 2 different uros all testing cam eback neg two cyystoscopies cytologues renal us CT urogram CT scan nothing was found to explain this. My question is am I now at a highher risk for possible bl

No: You have had all the necessary tests by 2 urologists and nothing was found. Most likely the hematuria was from your prostate. If there was bladder tumor or kidney tumor or renal pelvic tumor the studies you had would have been diagnostic. If hematuria recurs, go back to your urologist. It sounds like you are OK. ...Read more

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If normal morphology for red cells can a renal cause be eliminated for a microscopic hematuria in urine? Ct scan normal no infection.

If normal morphology for red cells can a renal cause be eliminated for a microscopic hematuria in urine? Ct scan normal no infection.

See a Urologist: CT with contrast is good to find small renal masses. Really tiny ones not on CTs can still cause hematuria, but are often not clinically significant, at least not yet. A follow up CT sometime may be considered.
Blood may be from the ureter or bladder, requiring CT/U/S or poss. MRI.
Blood can come from diffuse renal disease, esp. If there is also protein in the urine. CT may not see this. ...Read more

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Doctor diagnosed 1.4 CM renal cyst. I had an ultrasound that showed a 1.4 CM renal cyst with a question of calcification in cyst wall. Now I have to get a CT scan. How bad could this be. Am scared out of my mind.

Cyst: You have a small cyst, and it is not unusual to find cyst on US. Calcification itself doesn't make it cancer. I would proceed with the CT if that what has been ordered, and then see a Urologist. Was simple or complex cyst on US? The CT should show simple vs other cyst. Best of luck. ...Read more

Dr. Michael Gabor
1,885 Doctors shared insights

Ct Scan (Definition)

Computed tomography (ct scan) or computed axial tomography (cat scan), is a medical imaging procedure that utilizes computer-processed x-rays to produce tomographic images or 'slices' of specific ...Read more