Annals of Intensive Care (May 2025)

Characteristics of SARS-CoV-2-associated severe episodes of monoclonal gammopathy-associated capillary leak syndrome (Clarkson disease)

  • Nissim Grinberg,
  • Maddalena Alessandra Wu,
  • Quentin Moyon,
  • Sybille Merceron,
  • Yannick Fedun,
  • Marie Gousseff,
  • Romain Sonneville,
  • François Lhote,
  • Elie Azoulay,
  • Jean-Herlé Raphalen,
  • David Saadoun,
  • Ygal Benhamou,
  • Jean-Paul Mira,
  • Guillaume Dumas,
  • Pierre Bay,
  • Jérôme Devaquet,
  • Laurent Argaud,
  • Marc Lambert,
  • Avinash Aujayeb,
  • Basile Henriot,
  • Amandine Bichon,
  • Thomas Bocar,
  • John Harty,
  • Remo Melchio,
  • Franck Leibinger,
  • Laure Calvet,
  • Tomas Urbina,
  • Laurent Bodson,
  • Jean-Marie Tonnelier,
  • Danielle Reuter,
  • Emmanuel Canet,
  • Gilles Blaison,
  • Julien Maizel,
  • Nicholas Sedillot,
  • Laurence Dangers,
  • Vincent Eble,
  • Franco Verlicchi,
  • Stanislas Faguer,
  • Jonathan Montomoli,
  • Geoffroy Dingemans,
  • Marc Mikulski,
  • Jonas Pochard,
  • Fabrice Uhel,
  • Fleur Cohen-Aubart,
  • Charles-Edouard Luyt,
  • Alexis Mathian,
  • Alain Combes,
  • Riccardo Colombo,
  • Zahir Amoura,
  • Marc Pineton de Chambrun,
  • the EurêClark Study Group

DOI
https://doi.org/10.1186/s13613-025-01483-7
Journal volume & issue
Vol. 15, no. 1
pp. 1 – 12

Abstract

Read online

Abstract Background Monoclonal gammopathy-associated capillary leak syndrome (MG-CLS) is a rare condition characterized by recurrent episodes of hypovolemic shock caused by a sudden increase in capillary permeability. The COVID-19 pandemic has been associated with a rise in MG-CLS episodes and increased mortality. We aimed to explore the association between MG-CLS and SARS-CoV-2 infection. We conducted a multicenter retrospective observational study involving MG-CLS patients who were admitted to the intensive care unit (ICU). The primary endpoint was 28-day mortality according to whether SARS-CoV-2 was identified as a trigger. Results The study included 84 patients (44% women) with a median age of 55 years [IQR 46–62], accounting for 127 ICU admissions. Most patients (88%) had monoclonal gammopathy, predominantly with an IgG heavy chain (98%). A trigger was identified in 63% of cases, primarily suspected or confirmed viral infections, including 26 episodes of SARS-CoV-2 infection. Within 28 days of ICU admission, 32% of patients died. Episodes triggered by SARS-CoV-2 were associated with a higher need for mechanical ventilation (69% vs. 38%, p = 0.004), renal replacement therapy (54% vs. 31%, p = 0.03), and increased 28-day mortality (42% vs. 17%, p = 0.005). Multivariable analysis revealed that SARS-CoV-2 infection was independently associated with 28-day mortality (OR 4.67 [1.08–20.1], p = 0.04). The use of intravenous immunoglobulins did not improve 28-day survival. Conclusion In this large cohort of MG-CLS episodes requiring ICU admission, SARS-CoV-2as a trigger was associated with significantly higher 28-day mortality compared to other triggers. Further research is essential to elucidate the specific mechanisms by which SARS-CoV-2 impacts MG-CLS patients. Graphical abstract

Keywords