Evidence map›Paper›PMID 31002722›Full record

ArticlePloS one2019

Prognostic differences between oligometastatic and polymetastatic extensive disease-small cell lung cancer.

Masayuki Shirasawa, Tomoya Fukui, Seiichiro Kusuhara, Shinya Harada, Noriko Nishinarita, Yasuhiro Hiyoshi, Mikiko Ishihara, Masashi Kasajima, Satoshi Igawa, Masanori Yokoba and 5 more

Abstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  3. Different approach to M descriptor for future staging of oligometastatic disease in SCLC: A cross-sectional survival analysis.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Masayuki ShirasawaDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Tomoya FukuiDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Seiichiro KusuharaDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Shinya HaradaDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Noriko NishinaritaDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Yasuhiro HiyoshiDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Mikiko IshiharaDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Masashi KasajimaDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Satoshi IgawaDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Masanori YokobaDepartment of Medical Laboratory, Kitasato University School of Allied Health Sciences, Kanagawa, Japan.
Hisashi MitsufujiFundamental Nursing, Kitasato University School of Nursing, Kanagawa, Japan.
Masaru KubotaDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.
Masato KatagiriDepartment of Medical Laboratory, Kitasato University School of Allied Health Sciences, Kanagawa, Japan.
Jiichiro SasakiResearch and Development Center for New Medical Frontiers, Kitasato University School of Medicine, Kanagawa, Japan.
Katsuhiko NaokiDepartment of Respiratory Medicine, Kitasato University School of Medicine, Kanagawa, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeOligometastasis is a state in which cancer patients have a limited number of metastatic tumors; patients with oligometastases survive longer than those with polymetastases. Extensive disease (ED)-small cell lung cancer (SCLC) is considered a systemic disease and a poor survival. This study investigated whether the concept of oligometastases is prognostic factor also applicable to patients with ED-SCLC.

methodsWe performed a retrospective study of 141 consecutive patients with ED-SCLC between 2008 and 2016. The patients were divided into four subgroups: group 1; patients with solitary metastatic site in one organ (n = 31), group 2; patients with 2-5 metastatic sites in one organ (n = 18), group 3; patients with over 6 metastases in one organ (n = 15), and group 4; patients with 2 or more metastatic organs (n = 77).

resultsIt was identified that 49 patients with ED-SCLC had oligometastases (groups 1 + 2) and 92 had polymetastases (groups 3 + 4). The prognoses of patients with ED-SCLC and oligometastases, defined as ≤5 metastases in a single organ, were significantly superior to those of patients with polymetastases [16.0 (95% CI, 11.0-21.0) months vs. 6.9 (95% CI, 6.0-7.8) months; p<0.001]. 43 of 49 patients with ED-SCLC and oligometastases were relapsed after initial chemotherapy, and 38 (88%) experienced local recurrence.

conclusionsPatients with ED-SCLC and oligometastases may have improved survival than those with polymetastases. As oligometastatic ED-SCLC tends to recur locally, local therapy combined with systemic chemotherapy may be a treatment option.

Indexed as

AdultAgedAged, 80 and overAntineoplastic Combined Chemotherapy ProtocolsBrainFemaleHumansKaplan-Meier EstimateLung NeoplasmsMagnetic Resonance ImagingMiddle AgedNeoplasm MetastasisNeoplasm Recurrence, LocalPrognosisProportional Hazards ModelsRetrospective Studies

Identifiers

PMID31002722
PMCPMC6474590

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.