Single pembrolizumab treatment causing profound durable response in a patient with pulmonary pleomorphic carcinoma
Hirokazu Tokuyasu1, Soichiro Ishikawa1, Hiromitsu Sakai1
1Divisions of Respiratory Medicine, Matsue Red Cross Hospital, Shimane, Japan.
Abstract:
We report a case of a 73-year-old man diagnosed with pulmonary pleomorphic carcinoma who showed profound durable response after a single treatment with pembrolizumab. The patient underwent a diagnostic workup in our hospital due to a hoarseness of voice. Chest computed tomography revealed a massive pulmonary tumor in the left upper lobe and multiple nodules in the both lung fields. Histological examination of a transbronchial lung biopsy specimen revealed pulmonary pleomorphic carcinoma. First-line treatment with pembrolizumab was discontinued after a single administration due to treatment-related pneumonitis. However, durable response has been observed over 17 months to date.
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