Urine changing from clear to milky-white.

After sedation with propofol a young man developed milky-white urine. Urinalysis showed a high concentration of uric acid crystals as being responsible. This phenomenon appears to be dose-dependent and is explained in this report.

An alloantibody to a high-prevalence MNS antigen in a person with a GP.JL/Mk phenotype.

The low-prevalence MNS blood group antigenTSEN is located at the junction of glycophorin A (GPA) to glycophorin B (GPB) in several hybrid glycophorin molecules. Extremely rare people have RBCs with a double dose of the TSEN antigen and have made an antibody to a high-prevalence MNS antigen. We report the first patient who is heterozygous for GYP.