Cold agglutinin disease and autoimmune hemolytic anemia with pulmonary embolism as a presentation of COVID-19 infection
Background: Lymphopenia, thrombocytopenia, and elevated D-dimer and ferritin levels are frequently reported in patients with severe coronavirus disease 2019 (COVID-19). Here we report a case of cold agglutinin disease (CAD), autoimmune hemolytic anemia (AIHA), and pulmonary embolism as a presentation of COVID-19 infection. Case report: A 51-year-old African–American woman presented to the emergency room with fever and shortness of breath. She was tachycardic, febrile, and had an oxygen saturation of 88% on room air. Laboratory studies showed hemoglobin (Hb) 5.1 g/dL, D-dimer 4.55 mg/mL, and C-reactive protein 12.3 mg/dL. Computed tomography scan of the chest showed acute pulmonary embolism involving the bilateral lower lobe segmental branches. Her influenza test was negative, but her SARS-CoV-2 test returned positive. Due to severe anemia, she was not started on any anticoagulation. Haptoglobin was low. Direct antiglobulin test returned positive for anticomplement and negative for anti-immunoglobulin G. Cold agglutinin titer was 80. Mycoplasma, Epstein–Barr virus, parvovirus, human immunodeficiency viruses, and acute hepatitis screen were negative. Abdominal and pelvic computed tomography showed a normal liver and spleen without lymphadenopathy. Peripheral blood smear showed red blood cell agglutination. On Day 2, she became hypoxic requiring 6 L oxygen. Since her Hb remained stable, she was started on low-intensity unfractionated heparin. Inflammatory markers subsequently improved and she was weaned off oxygen. Her Hb remained stable at 9 g/dL and she was discharged home. After 2 weeks, her Hb increased to 11 g/dL. Conclusion: As exemplified in this case report, COVID-19 infection can lead to thromboembolism, CAD, and AIHA and it should be recognized as a potential etiology to such rare diseases.
Patil, Neha R.; Herc, Erica S.; and Girgis, Marian
"Cold agglutinin disease and autoimmune hemolytic anemia with pulmonary embolism as a presentation of COVID-19 infection,"
Hematology/Oncology and Stem Cell Therapy: Vol. 15
, Article 8.
Available at: https://doi.org/10.1016/j.hemonc.2020.06.005
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