What does this research mean for the field?

Cytomorphology is largely conserved across molecular subtypes of small cell lung carcinoma (SCLC), but POU2F3-positive tumors may exhibit non-classical features that can lead to misclassification. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.CHALLENGES_CONSENSUS.

What question did this study set out to answer?

To investigate cytologic features across different molecular subtypes of small cell lung carcinoma (SCLC).

March 8, 2026

Cytologic Features Across Molecular Subtypes of Small Cell Lung Carcinoma: Classical Uniformity With Exceptions in POU2F3-Positive Cases.

Key Points

To investigate cytologic features across different molecular subtypes of small cell lung carcinoma (SCLC).
Examined cytomorphology across SCLC molecular subtypes
Identified POU2F3-positive cases with atypical features
Focused on the implications for cytological misclassification
Most SCLC cases show conserved cytomorphology
A small subset of POU2F3-positive cases exhibits non-classical features
Highlighting the need for subtype-oriented testing in challenging diagnoses.

Abstract

Cytomorphology is largely conserved across molecular subtypes of SCLC, but a minority of POU2F3-positive tumours may display non-classical features. Recognition of this variant is important to avoid misclassification, particularly when only limited cytology material is available. These findings suggest that lineage-defining programs may occasionally imprint the cytologic phenotype and highlight the value of considering subtype-oriented ancillary testing in challenging cases.

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Discussion

Cite this study

Mizoguchi et al. (Fri,) studied this question.

www.synapsesocial.com/papers/69ada8dfbc08abd80d5bc372 — DOI: https://doi.org/10.1111/cyt.70067

Authors

Kai Mizoguchi

Yuki Teramoto

Masahiro Hirata

Actions

Institutions

Kyoto University Hospital

References and Citations

Connected Papers

Building similarity graph...

Analyzing shared references across papers

Cytologic Features Across Molecular Subtypes of Small Cell Lung Carcinoma: Classical Uniformity With Exceptions in POU2F3-Positive Cases.

Key Points

Abstract

Citation Network

Connected Papers

Discussion

Cite this study

Authors

Actions

Institutions

References and Citations

Citation Network

Connected Papers

Discussion