A member asked:

20y/o female. had a urine dipstick test done which came out positive for blood in urine but under examination in the lab they don't detect any red blood cells. what are the possible causes for this? (not on menstruation)

A doctor has provided 1 answer

Different tests: Whether or not the results matter depends on a person's symptoms and conditions, and on why the tests were done. Usually, the dipstick detects hemoglobin and myoglobin, the proteins in red blood cells and in muscle cells that make them reddish. The lab urine microscopic test looks for intact blood cells, etc... Many possible reasons for positive or negative results on each type of test.

Answered 11/14/2019

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