As part of a college health class my students performed a urinalysis using urine dipstick test strips.
The color range for bilirubin is from pale cream (negative) to light tan (positive).
My bilirubin test came back bright, deep, rose pink.
This was verified on several test strips taken from new urine samples throughout the day.
The lab manager of 10+ years and the other instructors have never seen this before.
The only information I can find about this abnormal result comes from test strip manufacturer literature:
"The presence of bilirubin-derived bile pigments ... is characterized by any color development on the test patch that does not correlate with the colors on the color chart."
"Atypical colors may indicate ... bile pigment abnormalities."
"Colors which are unlike either the positive or negative color blocks on the color chart may be due to the presence of bilirubin-derived bile pigments."
Unfortunately I can't find anything about "bilirubin-derived bile pigments" except for two sentences on Wikipedia. Where do they come from? What do they mean? Why might they be in my urine? I've had a normal blood bilirubin test within the last three months. My biggest health problem is unexplained macrocytic anemia. Could this be related?