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Clinicoradiological outcomes of 33 cases of surgically resected pulmonary pleomorphic carcinoma: correlation with prognostic indicators

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Abstract

Objectives

To retrospectively review the clinical, radiological and pathological data in patients who underwent surgical resection for pulmonary pleomorphic carcinoma (PC), and to analyse the prognostic predictors of survival.

Methods

The data were retrospectively examined for 33 consecutive patients (28 males and five females) who had undergone surgical resection for pulmonary PC. Cox’s proportional-hazards model was used to analyse the prognostic predictors of survival.

Results

The size of the tumours ranged from 1.1 to 12.0 cm (mean 5.4 cm). The majority (26) of the tumours were located at the lung periphery, five tumours had cavitation, two had calcification and 14 had peritumoral ground-glass opacity. Most of the tumours showed heterogeneous enhancement and contained a low-density area (LDA) within the tumour. The 5-year overall survival of surgically resected PC was 36 % (standard error = 0.093). A multivariate analysis revealed the LDA grade [hazard ratio (HR), 2.019], pathological stage (HR, 7.552) and pathological N factor (HR, 0.370) to be significant predictors of a poorer prognosis.

Conclusions

A greater component of LDA within the tumour on contrast-enhanced CT is associated with a poorer prognosis in patients with PC.

Key Points

PC has a poorer prognosis than other conventional NSCLC.

The five-year OS of surgically resected PC was 36 %.

A greater component of LDA on contrast-enhanced CT suggests a poorer prognosis.

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Abbreviations

PC:

Pleomorphic carcinoma

NSCLC:

Non-small-cell lung carcinoma

GGO:

Ground-glass opacity

LDA:

Low-density area

OS:

Overall survival

HR:

Hazard ratio

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Acknowledgements

The scientific guarantor of this publication is Prof. Dr. Kazuto Ashizawa. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. The authors state that this work has not received any funding. One of the authors has significant statistical expertise. Institutional Review Board approval was obtained. Written informed consent was waived by the Institutional Review Board. Methodology: retrospective, observational, performed at one institution.

The collection of the cancer data used in this study was supported in part by the cancer registry of Nagasaki prefecture.

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Correspondence to Kazuto Ashizawa.

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Nishida, A., Abiru, H., Hayashi, H. et al. Clinicoradiological outcomes of 33 cases of surgically resected pulmonary pleomorphic carcinoma: correlation with prognostic indicators. Eur Radiol 26, 25–31 (2016). https://doi.org/10.1007/s00330-015-3811-3

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  • DOI: https://doi.org/10.1007/s00330-015-3811-3

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