Transfusion Medicine Case 97 May 3, 2023 pathadmin 477 Comments Please wait... 1. Presented by Sintawat Wangsiricharoen, MD and reviewed by Lorraine N. Blagg, MA, MLS(ASCP)SBB An adult patient presented for a routine prenatal visit during the first trimester of pregnancy. A sample was received for type and screen. Blood bank results: Antibody identification: Phenotype: Paternal genotype: K/k Amniocentisis was not performed. The Anti-K titration results are as follows. Middle cerebral artery peak systolic velocity (MCA-PSV) was performed during the second trimester and was 1.58 MoM (normal range <1.5 MoM). Cordocentesis was performed to assess fetal hematocrit. Fetal sample: Genotype: heterozygous KEL*K/KEL*k; predicted phenotype K/k What is the most likely explanation of the discrepancy between phenotype and genotype?A. Poor quality antiseraB. Partial antigenC. Blocking phenomenonD. The fetus was recently transfused Loading...