Pulmonary pleomorphic carcinoma with few PD-1-positive immune cells and regulatory T cells that showed a complete response to nivolumab.

Abstract:

:Pulmonary pleomorphic carcinoma has been shown to respond remarkably to PD-1 inhibitors; however, the biomarkers for this therapy have not been fully proven. We report a case of pulmonary pleomorphic carcinoma with overexpressed PD-L1, in which a complete response to nivolumab was sustained for >14 months. Immunohistochemical analysis revealed few PD-1+ immune cells and regulatory T cells in the tumor, in addition to predominant infiltration of CD8+ cells and macrophages. Our findings suggest that the presence of a small number of PD-1+ immune cells and regulatory T cells should be investigated as candidate therapeutic biomarkers.

journal_name

Thorac Cancer

journal_title

Thoracic cancer

authors

Okamura K,Fukuda Y,Soda H,Ogawara D,Iwasaki K,Fuchi S,Suyama T,Yoshida M,Harada T,Fukuda M,Mukae H

doi

10.1111/1759-7714.12557

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

193-196

issue

1

eissn

1759-7706

issn

1759-7714

journal_volume

9

pub_type

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