British journal of haematology · 2023
Accessory spleens recapitulate the immune microenvironment of the main spleen in immune thrombocytopenia.
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Pizzi Marco, Vianello Fabrizio, Lorenzi Luisa, Binotto Gianni, Sbaraglia Marta, Scarmozzino Federico, De Crescenzo Andrea, Guzzardo Vincenza, Zoletto Simone, d'Amore Fabio, Friziero Alberto, D'Adda Mariella, Facchetti Fabio, Dei Tos Angelo Paolo
Аннотация
Accessory spleens (AcS) may play a relevant role in immune thrombocytopenia (ITP) and possibly contribute to ITP relapse following splenectomy. Little is known about the immune microenvironment of AcS in ITP. To address this issue, we compared the histological features of eight matched AcS and main spleen (MS) samples, obtained from adult patients with primary ITP. AcS and MS had overlapping immune architectural features and lymphoid composition, suggesting that similar immunologic events occur in AcS and MS of ITP. These findings may have implications for the potential mechanisms of AcS-mediated ITP relapse. Further studies are needed to confirm these results and to dissect spleen immunity in ITP.