Evidence map›Paper›PMID 40835472›Full record

ArticleInternal medicine (Tokyo, Japan)2026

A Rare Case of Occult Small-cell Lung Cancer with Initial Manifestations of Brain Metastases.

Ren Seike, Shun Takao, Maho Iwasaki, Toru Kuratomi, Jun Yano, Shohei Mishima, Yoshiko Okikawa, Hiroyasu Shoda, Yasuo Iwamoto

Abstract readCase Reports
In one paragraph

Article in Internal medicine (Tokyo, Japan), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–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

1 citing paper in PubMed.

  1. Article
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

9 authors.

Ren SeikeDepartment of Respiratory Medicine, Hiroshima City Hiroshima Citizens Hospital, Japan.
Shun TakaoDepartment of Respiratory Medicine, Hiroshima City Hiroshima Citizens Hospital, Japan.
Maho IwasakiDepartment of Respiratory Medicine, Hiroshima City Hiroshima Citizens Hospital, Japan.
Toru KuratomiDepartment of Respiratory Medicine, Hiroshima City Hiroshima Citizens Hospital, Japan.
Jun YanoDepartment of Respiratory Medicine, Hiroshima City Hiroshima Citizens Hospital, Japan.
Shohei MishimaDepartment of Respiratory Medicine, Hiroshima City Hiroshima Citizens Hospital, Japan.
Yoshiko OkikawaDepartment of Medical Oncology, Hiroshima City Hiroshima Citizens Hospital, Japan.
Hiroyasu ShodaDepartment of Respiratory Medicine, Hiroshima City Hiroshima Citizens Hospital, Japan.
Yasuo IwamotoDepartment of Respiratory Medicine, Hiroshima City Hiroshima Citizens Hospital, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We report a rare case of small-cell lung cancer (SCLC) detected 14 months after the initial manifestation of brain metastases. A 71-year-old man presented with neurological symptoms that led to the resection of brain neuroendocrine carcinoma (NEC). Despite extensive imaging, no primary tumor was detected during the initial visit. Fourteen months later, a lung nodule appeared in the emphysematous bullae in the left upper lobe, which was confirmed as SCLC. Chemotherapy plus durvalumab was administered to control the tumor. This case highlights the diagnostic challenges of occult SCLC and emphasizes that brain NEC should be carefully followed-up, particularly in patients with emphysema.

Indexed as

Brain NeoplasmsCarcinoma, NeuroendocrineLung NeoplasmsSmall Cell Lung CarcinomaAgedAntibodies, MonoclonalHumansMaleAntibodies, Monoclonaldurvalumabbrain metastasesemphysematous bullaeoccult lung cancersmall-cell lung cancer

Identifiers

PMID40835472
PMCPMC13106726

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.