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Diagnostic Pathology

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Open Access 01-12-2015 | Research

The percentage of lepidic growth is an independent prognostic factor in invasive adenocarcinoma of the lung

Authors: Trond-Eirik Strand, Hans Rostad, Erik H. Strøm, Philip Hasleton

Published in: Diagnostic Pathology | Issue 1/2015

Abstract

Background

The literature is inconclusive as to whether the percentage of the lepidic component of an invasive adenocarcinoma (AC) of the lung influences prognosis. We studied a population-based series of selected, resected invasive pulmonary ACs to determine if incremental increases in the lepidic component were an independent, prognostic variable.

Methods

Patients undergoing resection for lung cancer reported to the Cancer Registry of Norway and diagnosed in the period 1993-2002 with a bronchioloalveolar carcinoma (BAC) (old terminology) (adenocarcinoma in situ, AIS in the new terminology) in the lung were selected. A pulmonary pathologist reviewed all sections and estimated the percentage of the lepidic component. Follow-up of survival was to the end of 2013.

Results

One hundred thirty-one patients were identified, 102 had AC with lepidic growth. Of these, 44 had AC with a component of lepidic growth less than 50 % and seven had AC with 95 % lepidic component or more. One of the latter cases was considered to be AIS. In regression analyses, superior survival was associated with a greater lepidic component (p = 0.041). Mucinous tumors had a worse prognosis than non-mucinous (p = 0.012) in regression analyses, as did increasing age and stage. The five-year observed survival was 69.0 % for non-mucinous cases and 66.7 % for the group with a lepidic component of 80 % or greater.

Conclusion

The percentage of the lepidic component appears to be an independent, significant prognostic factor in a selection of pulmonary AC.

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Title: The percentage of lepidic growth is an independent prognostic factor in invasive adenocarcinoma of the lung
Authors: Trond-Eirik Strand
Hans Rostad
Erik H. Strøm
Philip Hasleton
Publication date: 01-12-2015
Publisher: BioMed Central
Published in: Diagnostic Pathology / Issue 1/2015
Electronic ISSN: 1746-1596
DOI: https://doi.org/10.1186/s13000-015-0335-8

At a glance: The STEP trials

Springer Medicine

The percentage of lepidic growth is an independent prognostic factor in invasive adenocarcinoma of the lung

Abstract

Background

Methods

Results

Conclusion

At a glance: The STEP trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusion

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