Case report: endocarditis or catheter-related right atrial thrombosis in a patient undergoing chemotherapy for Hodgkin lymphoma: diagnostic challenges and therapeutic dilemmas

In the initial management of an intracardiac mass in the context of scheduled chemotherapy, two primary diagnostic hypotheses arise: infectious endocarditis and intracardiac thrombus. Ultimately, interdisciplinary consultation with cardiovascular infectious disease experts suggested a thrombotic lesion associated with abnormal jet flow supported by the absence of clinical and biological signs of infection. Prompt discontinuation of antibiotics, initiation of appropriate anticoagulation therapy, and close monitoring enabled safe resumption of chemotherapy.