['Due to the threat of serious or fatal bleedings, fetuses with neonatal alloimmune thrombocytopenia (NAIT) may need intrauterine platelet (PLT) transfusions. To prevent a volume overload or an ABO minor mismatch, standard PLT concentrates need to be washed to increase the PLT concentration and to reduce the plasma content. Hyperconcentrated single-donor PLT concentrates (HCPs) are a therapeutic alternative. The first case of NAIT successfully treated with HCPs collected with the Trima Accel (TA; Gambro BCT) is reported.', 'A 31-year-old woman with a history of NAIT in the preceding pregnancy underwent cordocentesis three times during her third pregnancy (30th, 31st, and 32nd weeks of gestation). NAIT was confirmed by marked fetal thrombocytopenia, a maternal anti-human PLT antigen (HPA)-1a-immunoglobulin G (titer 1:128), and the appropriate HPA genotype of the fetus and the parents. On each cordocentesis procedure, a distinct volume of a HPA-1a-negative HCP with a PLT concentration of 3 x 10(6) PLTs per microL was transfused resulting in high corrected count increments after 2 hours. The HCPs were transfused within 10 hours after collection. One day after the last cordocentesis procedure, a cesarean section was performed. The newborn did not show any bleeding signs, and the PLT count remained on normal levels and no further PLT transfusions were needed.'] Does intrauterine use of hyperconcentrated platelet concentrate collected with Trima Accel in a case of neonatal alloimmune thrombocytopenia?