can cancer be detected in urine

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Dr. Jesse N. Mills answered:

If my bloody urine is caused by cancer, would there be cancer cells in the urine too?

Maybe

Cancer
Transitional cell carcinoma can be detected by urine cytology but it's not 100% sensitive. Other cancers such as breast or lung cancer will most likely not show up in the urine. Blood in the urine can be caused by many other things including chemotherapy for other cancers. Let your doctor know you have blood in the urine.
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Dr. Moez Khorsandi answered:

Do all types of cancer cause bloody urine?

No

Cancer
Only cancer so the urinary tract can cause blood in the urine. Other cancers may cause blood in the urine only if it is invading the urinary tract system.
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Can cancer grow on the ureters and cause bloody urine?

Yes

Cancer
cancer can grow from within the lining of the ureters, spread up and down the ureters to kidney pelvis and bladder and cause bloody urine
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Could my bloody urine be caused by cervical cancer?

It's possible

Cancer
If you are having blood in your urine it is important to see your doctor as soon as you can to be evaluated. It is possible for cervical cancer to cause bloody urine however this typically only happens in advanced cases where the cervical cancer is growing into the bladder.
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Dr. Moez Khorsandi answered:

Can anything besides cancer cause chronic bloody urine?

Yes

Cancer
There are several factors that may cause blood in the urine such as a urinary tract infection, trauma, kidney stones, and cancer. However, with a routine urological evaluation, the etiology is often identified and can then be treated accordingly. Some patients have chronic microscopic blood in the urine and a negative urological evaluation and the source may never be identified in these patients.
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Dr. Moez Khorsandi answered:

Is bloody urine a sign that bladder cancer has penetrated the wall of the bladder?

No

Urine
The amount of blood seen in the urine does not correlate with the degree of tumor invasion into the bladder muscle. The gold standard to determine the extent of invasion into the bladder muscle is to perform a special biopsy and evaluate for muscle invasion. One can have a little bleeding in the urine with a lot of muscle invasion or a lot of bleeding without muscle invasion.
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Dr. Chris Kyle answered:

Can primary care doctors test my bloody urine to make sure it isn't cancer, or do I need to see a specialist?

No

Bladder
if you have blood in the urine, you need a complete workup: 1. upper tract imaging -- most commonly a CT urogram. 2. urine test for cytology (look for cancer cells) 3. flexible cystoscopy to look at the bladder #1-2 can be ordered by PCP, but cystoscopy is only done by a urologist
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Dr. Hung Khong answered:

Patient with stage 4 lung cancer with brain metastasis is having very bloody urine. What does this mean?

Many things

Kidney
Stage IV lung cancer with bloody urine can mean many things. It could be due to the presence of a metastatic tumor in the bladder or the kidney. Please also note whether or not you are on a blood thinner. In uncommon case, it could also indicate the presence of a primary bladder tumor (though I doubt in this case). Bladder inflammation or infection could also be the cause. Check with your doctor.
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Dr. James M. Krick answered:

Bloody urine with some clots, painful urination. All went away after treatment on Bactrim. Lab report not in. Is this likely UTI or bladder cancer?

UTI

Bladder_cancer
Although statistically, hematuria in this setting is most likely due to cystitis/UTI, I would still recommend cystoscopy and upper tract imaging to rule out other more serious causes especially if there is not a strongly positive urinerr culture.
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Dr. Vasu K. Brown answered:

Is there a single disease that could cause tiredness, a lot of weight loss, nausea, and bloody urine?

Yes

Cancer
Need medical evaluation to make sure there is no lifethreating condition like cancer, infection, stones
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