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Erschienen in: Journal of Cancer Research and Clinical Oncology 10/2019

07.09.2019 | Original Article – Cancer Research

Validity of using immunohistochemistry to predict treatment outcome in patients with non-small cell lung cancer not otherwise specified

verfasst von: Takahiro Ota, Keisuke Kirita, Reiko Matsuzawa, Hibiki Udagawa, Shingo Matsumoto, Kiyotaka Yoh, Seiji Niho, Genichiro Ishii, Koichi Goto

Erschienen in: Journal of Cancer Research and Clinical Oncology | Ausgabe 10/2019

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Abstract

Purpose

Histology samples are important for the appropriate administration of tumor type-specific cytotoxic and molecular-targeted therapies for the treatment of non-small cell lung cancer (NSCLC). When biopsy samples lack a definite morphology, a diagnosis can be selected from three subtypes based on immunohistochemistry (IHC) results, as follows: favor adenocarcinoma (ADC), favor squamous cell carcinoma (SQC), or not otherwise specified (NOS)-null. In terms of patient outcome, however, the validity of IHC-based classifications remains unknown.

Methods

A large series of 152 patients with advanced NSCLC whose diagnoses had been made based on morphological findings and who had been homogeneously treated were enrolled. We used IHC staining (TTF-1, SP-A, p40, and CK5/6) to examine tumor samples and refined the diagnoses. We then analyzed the pathological subgroups according to the IHC staining results.

Results

IHC profiling resulted in 50% of the cases being classified as favor ADC, 31% being classified as favor SQC, and 19% being classified as NOS-null groups. Compared with the favor ADC and favor SQC groups, the NOS-null group had a significantly poorer outcome. Pemetrexed-containing platinum regimens produced a response rate similar to that of other platinum doublet regimens in the favor ADC group (44% vs. 46%), whereas it produced a poorer response in the favor SQC group (0% vs. 52%) and the NOS-null group (0% vs. 24%). The favor ADC group tended to have a higher percentage of EGFR positivity and ALK positivity than the favor SQC group (25% vs. 11% and 7% vs. 0%, respectively).

Conclusions

These findings support the use of immunohistological subtyping of NSCLC biopsy specimens to select patient-appropriate treatments.
Literatur
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Metadaten
Titel
Validity of using immunohistochemistry to predict treatment outcome in patients with non-small cell lung cancer not otherwise specified
verfasst von
Takahiro Ota
Keisuke Kirita
Reiko Matsuzawa
Hibiki Udagawa
Shingo Matsumoto
Kiyotaka Yoh
Seiji Niho
Genichiro Ishii
Koichi Goto
Publikationsdatum
07.09.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Cancer Research and Clinical Oncology / Ausgabe 10/2019
Print ISSN: 0171-5216
Elektronische ISSN: 1432-1335
DOI
https://doi.org/10.1007/s00432-019-03012-z

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