Existence of poorly differentiated tumour cells or paraneoplastic hypereosinophilia indicates extensive disease progression and poor prognosis in patients with malignancy. When these conditions are present, it is necessary to consider the possibility of intracardiac metastasis even in cases of lung adenocarcinoma.
Keywords: adenocarcinoma; cardiac metastasis; hypereosinophilia; lung cancer; pembrolizumab.
© 2024 The Authors. Respirology Case Reports published by John Wiley & Sons Australia, Ltd on behalf of The Asian Pacific Society of Respirology.