Immunohistochemical expression and prognostic value of PD-L1 in Extrapulmonary small cell carcinoma: a single institution experience.

J Immunother Cancer · 2018 · PMC5975459 · PMID 29843803

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showed a trendno p-value reported

PD-L1 positive tumors showed a trend toward improved median overall survival and there was separation of survival curves between the PD-L1 positive and negative groups at around 1 year, though not statistically significant.

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