[Postoperative Relapse of Combined Large‒Cell Neuroendocrine Carcinoma of the Lung with a Remarkable Transient Response to Amrubicin Monotherapy in an Elderly Patient-A Case Report].

An 86‒year‒old man with chronic kidney disease underwent surgical resection for combined large‒cell neuroendocrine carcinoma of the left lower lobe of the lung(pT2aN1M0, stage ⅡB). Five months later, multiple liver and bone metastases and mediastinal lymph node recurrence were detected. After 9 courses of amrubicin monotherapy(32 mg/m2 for 3 consecutive days), his tumor marker levels normalized, and radiological examination revealed a complete tumor response. Adverse events occurred, but they were tolerable except a decrease in the neutrophil count. The patient remained in good condition for several months but died of tumor relapse 22 months after the initial recurrence. Amrubicin monotherapy was considered to be one of the treatment choices for recurrent large‒cell neuroendocrine carcinoma of the lung in elderly patients.