Cardiovascular involvement in Erdheim-Chester diseases is associated with myocardial fibrosis and atrial dysfunction.

"Declarations Conflict of interestThe authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article. Ethical approvalEthical approval was obtained from the San Raffaele Ethical Committee (PanImmuno Protocol). Ethical standardsThis is an observational study including human participants and it was performed in line with the principles of the Declaration of Helsinki. Informed consentWritten informed consent was obtained from all subjects (patients) in this study. Conflict of interest The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article."

"Funding The authors state that this work has not received any funding."