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Published in: Annals of Surgical Oncology 6/2024

Open Access 23-03-2024 | Breast Surgery | Breast Oncology

Clinicopathological Predictors of Positive Resection Margins in Breast-Conserving Surgery

Authors: Hemali Chauhan, MBBS, BSc (Hons), MRCS, Natasha Jiwa, MBBS, BSc (Hons), MRCS, PhD, Vikneswaran Raj Nagarajan, MB, BCh, Paul Thiruchelvam, MBBS, BSc (Hons), FRCS, PhD, Katy Hogben, MBBS, BSc (Hons), FRCS, PhD, Ragheed Al-Mufti, MB, BCh, FRCS, MSc, MD, FRCS, Dimitri Hadjiminas, MD, MPhil, FRCS, Sami Shousha, MD, FRCPath, Ramsey Cutress, MB, BCh, FRCS, PhD, Hutan Ashrafian, PhD, MRCS, MBA, Zoltan Takats, PhD, Daniel Richard Leff, MBBS, FRCS, PhD, MS(Hons)

Published in: Annals of Surgical Oncology | Issue 6/2024

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Abstract

Background

Ductal carcinoma in situ (DCIS) is associated with risk of positive resection margins following breast-conserving surgery (BCS) and subsequent reoperation. Prior reports grossly underestimate the risk of margin positivity with IBC containing a DCIS component (IBC + DCIS) due to patient-level rather than margin-level analysis.

Objective

The aim of this study was to delineate the relative risk of IBC + DCIS compared with pure IBC (without a DCIS component) on margin positivity through detailed margin-level interrogation.

Methods

A single institution, retrospective, observational cohort study was conducted in which pathology databases were evaluated to identify patients who underwent BCS over 5 years (2014–2019). Margin-level interrogation included granular detail into the extent, pathological subtype and grade of disease at each resection margin. Predictors of a positive margin were computed using multivariate regression analysis.

Results

Clinicopathological details were examined from 5454 margins from 909 women. The relative risk of a positive margin with IBC + DCIS versus pure IBC was 8.76 (95% confidence interval [CI] 6.64–11.56) applying UK Association of Breast Surgery guidelines, and 8.44 (95% CI 6.57–10.84) applying the Society of Surgical Oncology/American Society for Radiation Oncology guidelines. Independent predictors of margin positivity included younger patient age (0.033, 95% CI 0.006–0.060), lower specimen weight (0.045, 95% CI 0.020–0.069), multifocality (0.256, 95% CI 0.137–0.376), lymphovascular invasion (0.138, 95% CI 0.068–0.208) and comedonecrosis (0.113, 95% CI 0.040–0.185).

Conclusions

Compared with pure IBC, the relative risk of a positive margin with IBC + DCIS is approximately ninefold, significantly higher than prior estimates. This margin-level methodology is believed to represent the impact of DCIS more accurately on margin positivity in IBC.
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Metadata
Title
Clinicopathological Predictors of Positive Resection Margins in Breast-Conserving Surgery
Authors
Hemali Chauhan, MBBS, BSc (Hons), MRCS
Natasha Jiwa, MBBS, BSc (Hons), MRCS, PhD
Vikneswaran Raj Nagarajan, MB, BCh
Paul Thiruchelvam, MBBS, BSc (Hons), FRCS, PhD
Katy Hogben, MBBS, BSc (Hons), FRCS, PhD
Ragheed Al-Mufti, MB, BCh, FRCS, MSc, MD, FRCS
Dimitri Hadjiminas, MD, MPhil, FRCS
Sami Shousha, MD, FRCPath
Ramsey Cutress, MB, BCh, FRCS, PhD
Hutan Ashrafian, PhD, MRCS, MBA
Zoltan Takats, PhD
Daniel Richard Leff, MBBS, FRCS, PhD, MS(Hons)
Publication date
23-03-2024
Publisher
Springer International Publishing
Published in
Annals of Surgical Oncology / Issue 6/2024
Print ISSN: 1068-9265
Electronic ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-024-15153-8

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