Evidence map›Paper›PMID 29514672›Full record

ArticleBreast cancer research : BCR2018

The origins of breast cancer associated with mammographic density: a testable biological hypothesis.

Norman Boyd, Hal Berman, Jie Zhu, Lisa J Martin, Martin J Yaffe, Sofia Chavez, Greg Stanisz, Greg Hislop, Anna M Chiarelli, Salomon Minkin and 1 more

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Breast cancer research : BCR, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03920098 (The Chilean Maternal and Infant Nutrition Cohort Study II), which is not on this map. Cited by 26 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 2 pooled it
3.4field-weighted citation impact, top 6% of its field
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.

NCT03920098 unknown statusnot on this mapstarted 2019, after this paper: background citation

The Chilean Maternal and Infant Nutrition Cohort Study II

TypeobservationalSponsorInstituto de Nutrición y Tecnología de los AlimentosRan2019 to 2023Enrolled1,927ConditionsBreast Density, Body Composition, Nutritional Status, Mental Health IssueArmsNutrition and mental health during pregnancy
3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 2 syntheses or guidelines pooled it, 46 citations in OpenAlex.

  1. Pooled it
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  16. Chest CT for Breast Cancer Diagnosis.Life (Basel, Switzerland) · 2022
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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

11 authors at 5 institutions in 1 country.

Norman BoydPrincess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada. Norman.Boyd@UHNNresearch.ca.
Hal BermanPrincess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada.
Jie ZhuPrincess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada.
Lisa J MartinPrincess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada.
Martin J YaffeImaging Research, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.
Sofia ChavezImaging Research, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.
Greg StaniszImaging Research, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.
Greg HislopBC Cancer Agency, Vancouver, BC, Canada.
Anna M ChiarelliCancer Care Ontario, Toronto, ON, Canada.
Salomon MinkinPrincess Margaret Cancer Centre, 610 University Avenue, Room 9-502, Toronto, ON, M5G 2M9, Canada.
Andrew D PatersonGenetics and Genome Biology, Hospital for Sick Children Research Institute, Toronto, ON, Canada.
Princess Margaret Cancer Centre · CAHealth Sciences Centre · CABC Cancer Agency · CACancer Care Ontario · CAUniversity of Toronto · CA

Funding

National Instiutes of Health RO1CA082826-01
6 · The paper itself

Abstract

backgroundOur purpose is to develop a testable biological hypothesis to explain the known increased risk of breast cancer associated with extensive percent mammographic density (PMD), and to reconcile the apparent paradox that although PMD decreases with increasing age, breast cancer incidence increases.

methodsWe used the Moolgavkar model of carcinogenesis as a framework to examine the known biological properties of the breast tissue components associated with PMD that includes epithelium and stroma, in relation to the development of breast cancer. In this model, normal epithelial cells undergo a mutation to become intermediate cells, which, after further mutation, become malignant cells. A clone of such cells grows to become a tumor. The model also incorporates changes with age in the number of susceptible epithelial cells associated with menarche, parity, and menopause. We used measurements of the radiological properties of breast tissue in 4454 healthy subjects aged from 15 to 80+ years to estimate cumulative exposure to PMD (CBD) in the population, and we examined the association of CBD with the age-incidence curve of breast cancer in the population.

resultsExtensive PMD is associated with a greater number of breast epithelial cells, lobules, and fibroblasts, and greater amounts of collagen and extracellular matrix. The known biological properties of these tissue components may, singly or in combination, promote the acquisition of mutations by breast epithelial cells specified by the Moolgavkar model, and the subsequent growth of a clone of malignant cells to form a tumor. We also show that estimated CBD in the population from ages 15 to 80+ years is closely associated with the age-incidence curve of breast cancer in the population.

conclusionsThese findings are consistent with the hypothesis that the biological properties of the breast tissue components associated with PMD increase the probability of the transition of normal epithelium to malignant cells, and that the accumulation of mutations with CBD may influence the age-incidence curve of breast cancer. This hypothesis gives rise to several testable predictions.

Indexed as

Breast DensityAdolescentAdultAgedAged, 80 and overAge FactorsBreastBreast NeoplasmsEpithelial CellsFemaleFibroblastsHumansMammographyMenopauseMiddle AgedMutationBreast cancerCarcinogenesisMammographic densityTwo-stage model

Identifiers

PMID29514672
PMCPMC5842598
OpenAlexW2792126790

What OpenQuestion holds

Textmetadata
LicenceCC BY
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Registered trials

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.