Doctor insights on:
False Positive Test Results
Uncommon: The current tests for chlamydia have an accuracy of over98%. ...Read more
Lupus biopsy: Biopsy of lupus has a number of features that lead to diagnosis: a thickened basement membrane, vacuolar alteration of basal keratinocytes and superficial and deep inflammatory infiltrate. Lupus has a number of different forms in the skin and there are times when it is not easy to differentiate it from other types of skin inflammation. There are other tests to support diagnosis. ...Read moreSee 1 more doctor answer
How likely would be a false positive test result of tyrosinuria in metabolic urine screening after 12 hours fasting? If indeed pos., what is the cause
Rare entity if true: This is a rare condition that can be treated with a low phenylalanine/tyrosine diet. Blurry vision could be related but unlikely. High cholesterol and triglycerides are probably unrelated. Tyrosinuria is a genetic disease most common in french canadians. Repeat test if marginally abnormal. ...Read more
I took Ibuprofen a couple of hours before a urine drug screening test. Will I receive a false positive test result?
As far as I know,: the only food that can cause positive results in urine (and other) drug testing is poppy seeds. This is actually not a false positive, because poppy seeds do contain very tiny amounts of a chemical related to morphine, papaverine, which is metabolized into morphine. I am not aware of any other food that can do this. They are found in pastries, bagels and other baked goods. ...Read more
Complex: Hi. It's unlikely "stress" can give a false positive TSH elevation, but "stress" comes in multiple flavors. If a person is severely ill (usually ICU-tpye ill or at least hospitalized), an adaptive response (unfortunately) called "euthyroid sick syndrome" can show a TSH elevation in that range during a phase of the condition. Only in a case like that. Stress like a final exam next week? No. ...Read moreSee 1 more doctor answer
Misinformed?: Who told you that your hep c test was false? If you have no viral load that means you cleared an infection. Are you sure you are getting the right advice? ...Read more
Please advise if it's less or more likely to get a false positive pregnancy test result while intoxicated?
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