Left ventricular mass in a patient with peripheral eosinophilia.

: A 63-year-old man presented with dyspnea and night sweats. Blood work revealed an elevated white count of 23.7 × 10 cells/l with 33% eosinophils and bone marrow biopsy made a diagnosis of myeloproliferative eosinophilia. Transthoracic echocardiography found a large left ventricular mass filling the distal third of the cavity. Transesophageal echocardiograpm confirmed the findings. Herein, we discuss this unique case of hypereosinophilic syndromes with pathognomonic imaging of its cardiovascular sequelae.