A rare and life-threatening combination of neonatal Jka hemolytic disease, hemolytic disease of the fetus and newborn (HDFN) and fetal and neonatal alloimmune thrombocytopenia (FNAIT) was successfully treated in a newborn, highlighting the importance of early detection and targeted care, according to a case report published recently in BMC Pediatrics.
This is the first known case where both conditions occurred simultaneously, and the infant’s recovery depended on timely blood transfusions and immunoglobulinIntravenous immunoglobulin A therapy made from donated antibodies that may help reduce the mother’s immune response and protect the fetus. therapy. The newborn boy was delivered at 39 weeks via emergency cesarean section after decreased fetal movement and an unresponsive non-stress test prompted urgent intervention.
At birth, he showed no breathing or muscle tone and had an extremely low Apgar score. Immediate resuscitation and ventilation were needed. Doctors found the newborn severely anemic, with a hemoglobin level of just 30.8 g/L, a critically low platelet count of 13 × 10⁹/L and signs of metabolic acidosis and shock. His condition declined rapidly, requiring emergency blood transfusions.
“In general, HDFN secondary to antibodiesAntibody A protein made by the immune system that recognizes and attacks foreign substances, such as bacteria, or in HDFN, fetal red blood cells carrying incompatible antigens. against non-ABO/RhRh factor A protein or antigen found on red blood cells. When an Rh-negative mother carries an Rh-positive fetus, her immune system may make antibodies that attack the fetus' red blood cells. antigensAntibody A protein made by the immune system that recognizes and attacks foreign substances, such as bacteria, or in HDFN, fetal red blood cells carrying incompatible antigens. should be considered in cases of hemolytic anemiaAnemia A condition that occurs when the body doesn’t have enough healthy red blood cells to carry oxygen to its tissues. In HDFN, anemia occurs when maternal antibodies destroy fetal red blood cells. in a newborn in the absence of ABO or Rh incompatibility,” the authors wrote. “Prompt maternal and neonatal DATDirect antiglobulin test A blood test used to detect antibodies attached to red blood cells. It helps confirm HDFN in newborns. testing and antibodyAntibody A protein made by the immune system that recognizes and attacks foreign substances, such as bacteria, or in HDFN, fetal red blood cells carrying incompatible antigens. identification are essential for diagnosis, followed by aggressive treatment to minimize the risk of adverse outcomes.”
Read more about HDFN testing and diagnosis
Further testing confirmed that both mother and baby carried anti-Jka antibodies, indicating Jka hemolytic disease. At the same time, both tested positive for platelet antibodies, confirming HDFN. The newborn’s anemia and thrombocytopenia improved with three red cell transfusions and intravenous immunoglobulinIntravenous immunoglobulin A therapy made from donated antibodies that may help reduce the mother’s immune response and protect the fetus., which raised his hemoglobin and platelet levels and stabilized his condition.
Upper gastrointestinal bleeding and dangerously low platelet levels on day 2 responded to gastric lavage, topical thrombin, and continued intravenous immunoglobulin treatment. By day 4, his levels of bilirubinBilirubin A yellow substance produced when red blood cells break down. High bilirubin levels in newborns with HDFN can cause jaundice or, in severe cases, brain damage. peaked at 221 umol/L and were managed with phototherapyPhototherapy A treatment that uses special blue light to help newborns break down bilirubin and prevent kernicterus.. Gradually, his color, oxygen levels, and lab values normalized. No abnormalities were seen in cranial MRI or hearing tests. He was discharged on day 8, and follow-up showed normal development.
The mother had shown no signs of thrombocytopenia or anemia in her previous pregnancy and had not been screened for irregular antibodies during this one. Her platelet count was normal before delivery, but the irregular antibodies test was positive on the day of delivery. This case suggests that routine antibody screening in later pregnancies might help identify risks earlier.
Only 14 previous cases of neonatal Jka hemolytic disease have been reported in the medical literature, and none involved HDFN. This case emphasizes the need for greater awareness among clinicians and expectant parents, as missed or delayed diagnosis of rare but severe conditions such as this can be fatal without immediate treatment.
Sign up here to get the latest news, perspectives, and information about HDFN sent directly to your inbox. Registration is free and only takes a minute.
