Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 258

The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.

Why are local recurrences after breast-conserving therapy more frequent in younger patients?

Kurtz, J M, Jacquemier, J, Amalric, R, Brandone, H, Ayme, Y, Hans, D, Bressac, C, Spitalier, J M·1990·Journal of Clinical Oncology

Abstract

The influence of patient age on risk of recurrence in the breast was retrospectively studied in 496 stage I-II invasive ductal carcinomas treated by macroscopically complete primary tumor excision followed by radiotherapy. With a median follow-up of 71 months, local recurrence occurred in 13 of 62 (21%) patients younger than 40 years, compared with 48 of 434 (11%) older patients (P less than .025). Cox multivariate analysis of 18 parameters identified four that significantly determined risk: major lymphocytic stromal reaction (MCR), unsatisfactory resection margins, increasing histologic grade, and extensive intraductal cancer (DCIS) within the primary tumor. Compared with older patients, those younger than 40 years had tumors that more often exhibited MCR (36% v 20%, P less than .01), histologic grade 3 (42% v 28%, P less than .025), and very extensive DCIS (21% v 6%, P less than .001). The status of resection margins did not differ significantly between younger and older patients. Restriction of Cox analysis to patients younger than 40 indicated that risk was adequately described by MCR and percentage of DCIS, without consideration of grade or margins. For patients younger than 40, local failure occurred in four of five (80%) tumors with both MCR and more than 50% DCIS, in eight of 25 (32%) with either, and one of 32 (3.1%) with neither of these morphologic features. This study suggests that the higher local failure risk observed in patients younger than 40 years reflects the greater prevalence of certain morphologic characteristics in breast cancers in younger patients. Age itself does not appear to be an independent determinate of risk.

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 · 10.1200/jco.1990.8.4.591

Cites

10 of 10 references verified0 citation errors · 0 not checkable

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

Cites

Show all 10 references

Cited by

See all 258

Metadata

Authors
Kurtz, J. M., Jacquemier, J., Amalric, R., Brandone, H., Ayme, Y., Hans, D., Bressac, C., & Spitalier, J. M.
Venue
Journal of Clinical Oncology
Published
1990-04
Volume
8
Issue
4
Pages
591-598
ISSN
  • 0732-183X (ISSN-L)
  • 1527-7755
OpenAlex
W1916488626
Cited by
258
References
10
FWCI
5.80
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: Why are local recurrences after breast-conserving therapy more frequent in younger patients? https://app.cochat.ai/papers/10.1200/jco.1990.8.4.591
The paper
Kurtz, J. M., Jacquemier, J., Amalric, R., Brandone, H., Ayme, Y., Hans, D., Bressac, C., & Spitalier, J. M. (1990). Why are local recurrences after breast-conserving therapy more frequent in younger patients? Journal of Clinical Oncology. https://doi.org/10.1200/jco.1990.8.4.591

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.