1. Department of Clinical Immunology Hôpital Saint‐Louis Assistance Publique Hôpitaux de Paris (APHP) Paris France
2. National Reference Centre for Castleman Disease (CRMdC) Paris France
3. UMR1149 CRI INSERM‐Université Paris Diderot Paris France
4. Université Paris Diderot, Paris 7 Paris France
5. Inserm U1126 Centre Hayem Hôpital Saint‐Louis Paris France
6. EA3518 Université Paris Diderot, Paris 7 Paris France
7. Department of Internal Medicine Hôpital Bichat Assistance Publique Hôpitaux de Paris (APHP) Paris France
8. INSERM UMR‐S1152 Hôpital BichatUniversité Paris Diderot, Paris 7 Paris France
9. Division of Thoracic and vascular surgery Hôpital Bichat Paris France
10. Department of Pathology Hôpital Saint‐Louis Assistance Publique Hôpitaux de Paris (APHP) Paris France