Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 794

The DOI matches its Crossref record.

The Gastroenteropancreatic Neuroendocrine Cell System and Its Tumors: The WHO Classification

KLÖPPEL, GÜNTER, PERREN, AUREL, HEITZ, PHILIPP U.·2004·Annals of the New York Academy of Sciences

Abstract

A bstract: Although well established in medical terminology, the term carcinoid is no longer adequate to cover the entire morphological and biological spectrum of neoplasms of the disseminated neuroendocrine cell system. Therefore, instead of carcinoid, the WHO classification published in 2000 uses the general terms neuroendocrine tumor and neuroendocrine carcinoma. In this review a classification of gastroenteropancreatic neuroendocrine tumors based on the WHO criteria is described. We also classify and comment on the most important tumor entities. On the basis of localization and of various morphological and biological criteria, we distinguish between benign neuroendocrine tumors, tumors with uncertain malignant potential, and tumors showing low‐grade and high‐grade malignancy.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1196/annals.1294.002

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 794

Metadata

Authors
KLÖPPEL, G., PERREN, A., & HEITZ, P. U.
Venue
Annals of the New York Academy of Sciences
Publisher
Wiley
Published
2004-04
Volume
1014
Issue
1
Pages
13-27
ISSN
  • 0077-8923 (ISSN-L)
  • 1749-6632
OpenAlex
W2084793761
Cited by
794
References
0
FWCI
17.56
Type
journal article
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: The Gastroenteropancreatic Neuroendocrine Cell System and Its Tumors: The WHO Classification. https://app.cochat.ai/papers/10.1196/annals.1294.002
The paper
KLÖPPEL, G., PERREN, A., & HEITZ, P. U. (2004). The Gastroenteropancreatic Neuroendocrine Cell System and Its Tumors: The WHO Classification. Annals of the New York Academy of Sciences. https://doi.org/10.1196/annals.1294.002

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.