Two cases of systemic capillary leak syndrome associated with COVID-19 in Japan.

Systemic Capillary Leak Syndrome (SCLS) is a rare disease that causes severe distributive shock provoked by infection or vaccination. SCLS is clinically diagnosed by a triad of distributive shock, paradoxical hemoconcentration, and hypoalbuminemia. SCLS associated with coronavirus disease (COVID-19) in adults has not been reported yet in Japan. Case 1: A 61-year-old woman with fever, sore throat, headache, and muscle pain was admitted to our emergency department with suspected COVID-19. She had been diagnosed with SCLS 3 years earlier. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antigen and polymerase chain reaction (PCR) tests were negative at admission. She went into shock in the emergency department and was treated for septic shock. The following day, the SARS-CoV-2 PCR test was positive. She did not respond to fluid resuscitation and catecholamine and finally died. Case 2: A 58-year-old man was admitted to our hospital for de-saturation due to COVID-19. He got into shock on day 3. SCLS was suspected, and 5 g of intravenous immunoglobulin and 5% albumin were administered for sepsis treatment. He responded to the aggressive fluid therapy within 48 h and was finally discharged. COVID-19 can trigger SCLS, and early recognition of SCLS is crucial for survival. Primary care physicians should consider SCLS when they observe distributive shock and paradoxical hemoconcentration deviations from the natural course of COVID-19.

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Copyright © 2023 Japanese Society of Chemotherapy, Japanese Association for Infectious Diseases, and Japanese Society for Infection Prevention and Control. Published by Elsevier Ltd. All rights reserved.

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Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.