Letters to the Editor

PD-1/PD-L1 expression is frequent and correlated with lymphocyte density in Erdheim-Chester disease

Sorbonne Universite, Assistance Publique-Hopitaux de Paris, Departement d’Anatomo-Pathologie, Hopital Pitie-Salpetriere, 75013-Paris
Sorbonne Universite, Assistance Publique-Hopitaux de Paris, Service de Medecine Interne 2, Centre National de Reference des Histiocytoses, Hopital Pitie-Salpetriere, 75013-Paris
Sorbonne Universite, Assistance Publique-Hopitaux de Paris, Service de Medecine Interne 2, Centre National de Reference des Histiocytoses, Hopital Pitie-Salpetriere, 75013-Paris
Sorbonne Universite, Assistance Publique-Hopitaux de Paris, Service de Medecine Interne 2, Centre National de Reference des Histiocytoses, Hopital Pitie-Salpetriere, 75013-Paris
Service de Pathologie, Hopital Ambroise Pare, 92104-Boulogne, France; EA4340-BECCOH, Universite de Versailles SQY, Universite Paris-Saclay, 92104-Boulogne
Sorbonne Universite, Assistance Publique-Hopitaux de Paris, Service de Medecine Interne 2, Centre National de Reference des Histiocytoses, Hopital Pitie-Salpetriere, 75013-Paris
Haematologica Early view Apr 28, 2022 https://doi.org/10.3324/haematol.2021.280312