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Doctor insights on: Ultrasound False Positive For Kidney Stones

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Experienced my 2nd kidney stone yesterday. How can I prevent passing another? I'm 26 years old, and yesterday i passed a kidney stone. This was my second experience with a kidney stone, as i also passed one about 15-months ago. As anybody that has experie

Experienced my 2nd kidney stone yesterday. How can I prevent passing another? I'm 26 years old, and yesterday i passed a kidney stone. This was my second experience with a kidney stone, as i also passed one about 15-months ago. As anybody that has experie

Diet modification: You can have your urine analyzed for kidney stone risk factors. My usual recommendations are 1) increase plain water to at least 2 liters a day 2) decrease sodium intake 3) decrease animal protein intake 4) add a teaspoon of real lemon juice to diet daily. ...Read more

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Dr. Michael Gabor
2,190 doctors shared insights

Sonogram (Definition)

An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. There are no side effects. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body. In addition to diagnostic uses, such as evaluating abnormalities in the abdomen, pelvis, and breast, ultrasounds are commonly used to guide needle and catheter placement in a variety of surgical ...Read more


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Do ultrasounds ever miss kidney stones?

Do ultrasounds ever miss kidney stones?

Yes frequently: Small stones can easily be missed, by any ultrasound machine especially by office ultrasound machines. Spiral ct scan is the most reliable imaging tool for small kidney stones. Flank pain & microscopic blood in urine are frequently good clues to presence of stones. Good news is that small kidney stones usually pass spontaneously & require no intervention. ...Read more

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Can kidney stones be found with an ultrasound?

Can kidney stones be found with an ultrasound?

Yes: Ultrasound may not see the stone well but may see swelling in the tube (ureter) where a stone has clogged up the drain. A cat scan (ct) is usually the preferred test to better see the stones. But, unlike ultrasound exposes you to some radiation. ...Read more

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Is a catscan or ultrasound better for seeing kidney stones?

Is a catscan or ultrasound better for seeing kidney stones?

Depends: For renal stones (in kidney), ultrasound is usually adequate. Can also see dilation of the kidney when stone is blocking the outflow tube (ureter). For better clear picture and to see ureteral stones which are closer to bladder, ct scan is better. However, all ctscans must be considered carefully given the radiation exposure to the patient which ultrasound does not have. ...Read more

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What else can look like lots of small kidney stones in ultrasound?

Calcifications: Calcifications in blood vessels can sometimes look like kidney stones. If your doctors are unclear about whether or not you have kidney stones they may want to do a CT scan which is a better test than US for detecting and diagnosing kidney stones. ...Read more

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My fiancee got a kidney stone of 6mm in size according to the ultrasound, is it possible to pass it without surgery?

My fiancee got a kidney stone of 6mm in size according to the ultrasound, is it possible to pass it without surgery?

Ureteral stone: The size of the stone does not correlate well to the intensity of the pain. The nearly unbearable pain of "ureteral colic" is from spasm of the muscular ureter. Although likely to pass on its own within a few days, a 3mm stone sometimes will get stuck and fail to progress. A 6mm stone, less likely usually after 5 days, i recommend having the stone extracted with a ureteroscope as an outpatient. ...Read more

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I recently had an ultrasound of my right kidney where a kidney stone was found along with a 3mm bright echo was found. Should i be concerned?

I recently had an ultrasound of my right kidney where a kidney stone was found along with a 3mm bright echo was found. Should i be concerned?

Probably not...: Increased use of us or ct to evaluate body pain had led to finding small asymptomatic stone or mass in kidneys, lungs, liver, etc. Which is incidental and poses substantial dilemma on how to handle these subclinical findings. For kidney stone of 3 mm, i would leave it alone if you have no stone-related symptoms., but followed yearly with a x-ray film (kub). More detailing, work with urologist. ...Read more

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25 yr old male has had kidney stones and is experiencing similar pain.ultrasound & urine showed no stones.Pain is getting worse.other possibility?

Maybe more imaging: CT scan of abdomen without contrast adminstration is more sensitive for detecting small stones than ultrasound. CT with contrast could demonstrate other causes of pain. ...Read more

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Is it possible to have kidney stones, but not have any evidence of them in urine samples or ultrasounds?

Is it possible to have kidney stones, but not have any evidence of them in urine samples or ultrasounds?

Yes: These stones may be too small see on ultrasound and a routine urinalysis may easily miss stones as well. The best test for diagnosing the majority of stones in the urinary tract is a ct scan without contrast. This will detect the majority of kidney stones but a few may be missed occasionally. ...Read more

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What are the signs of a kidney stone on ultrasound?

What are the signs of a kidney stone on ultrasound?

Bright spots: Kidney stones show up on ultrasound as bright echogenic foci (white spots) within the substance of the kidney. If the stones are larger than 3 or 4 mm there will be a darker area behind the stone representing an acoustical shadow. Obstruction of the kidney by a stone will cause dilatation of the kidney's collecting system which will appear as black fluid spaces within the kidney. ...Read more

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Dr. Amrita Dosanjh
64 doctors shared insights

Kidney Stones (Definition)

Seriously- renal stones are the result of postive and negatively charged particles in urine binding together and precipitating as solids- most frequently as calcium- oxalate. This happens most often when the urine is concentrated- ie when you are dehydrated. And trying to pass these stones from the kidney to the bladder is incredibly painful. ...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