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dc.contributor.authorSheri, Aen_US
dc.contributor.authorSmith, IEen_US
dc.contributor.authorHills, Men_US
dc.contributor.authorJones, RLen_US
dc.contributor.authorJohnston, SRen_US
dc.contributor.authorDowsett, Men_US
dc.identifier.citationBreast Cancer Res Treat, 2017, 164 (2), pp. 395 - 400en_US
dc.description.abstractAIMS: To determine whether IHC4 score assessed on pre-treatment core biopsies (i) predicts response to neo-adjuvant chemotherapy in ER-positive (ER+) breast cancer; (ii) provides more predictive information than Ki67 alone. METHODS: 113 patients with ER+ primary breast cancer treated with neo-adjuvant chemotherapy at the Royal Marsden Hospital between 2002 and 2010 were included in the study. Pathologic assessment of the excision specimen was made for residual disease. IHC4 was determined on pre-treatment core biopsies, blinded to clinical outcome, by immunohistochemistry using quantitative scoring of ER (H-score), PgR (%) and Ki67 (%). Determination of HER2 status was made by immunohistochemistry and fluorescent in situ hybridization for 2+ cases. IHC4 and Ki67 scores were tested for their association with pathological complete response (pCR) rate and residual cancer burden (RCB) score. RESULTS: 18 (16%) of the 113 patients and 8 (9%) of the 88 HER2-ve cases achieved pCR. Ki67 and IHC4 score were both positively associated with achievement of pCR (P < 10-7 and P < 10-9, respectively) and RCB0+1 (P < 10-5 and P < 10-9, respectively) following neo-adjuvant chemotherapy in all patients. Rates of pCR+RCB1 were 45 and 66% in the highest quartiles of Ki67 and IHC4 scores, respectively. In ER+HER2-ve cases, pCR+RCB1 rates were 35% and in the highest quartile of both Ki67 and IHC4. There were no pCRs in the lower half of IHC4 or Ki67 scores. CONCLUSIONS: IHC4 was strongly predictive of pCR or near pCR in ER+ breast cancers following neo-adjuvant chemotherapy. Ki67 was an important component of this predictive ability, but was not as predictive as IHC4.en_US
dc.format.extent395 - 400en_US
dc.subjectBreast canceren_US
dc.subjectNeo-adjuvant chemotherapyen_US
dc.titleRelationship between IHC4 score and response to neo-adjuvant chemotherapy in estrogen receptor-positive breast cancer.en_US
dc.typeJournal Article
rioxxterms.typeJournal Article/Reviewen_US
dc.relation.isPartOfBreast Cancer Res Treaten_US
pubs.notesNot knownen_US
pubs.organisational-group/ICR/Primary Group
pubs.organisational-group/ICR/Primary Group/ICR Divisions
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Breast Cancer Research
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Breast Cancer Research/Endocrinology
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Clinical Studies
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Clinical Studies/Medicine (RMH Smith Cunningham)
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Clinical Studies/Medicine (RMH Smith Cunningham)/Medicine (RMH Smith Cunningham) (hon.)
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Clinical Studies/Sarcoma Clinical Trials (R Jones)
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Clinical Studies/Sarcoma Clinical Trials (R Jones)/Sarcoma Clinical Trials (R Jones) (hon.)
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Molecular Pathology
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Molecular Pathology/Endocrinology
pubs.organisational-group/ICR/Primary Group/ICR Divisions/Molecular Pathology/Endocrinology/Endocrinology (hon.)
pubs.organisational-group/ICR/Primary Group/Royal Marsden Clinical Units
pubs.embargo.termsNot knownen_US
icr.researchteamMedicine (RMH Smith Cunningham)en_US
icr.researchteamSarcoma Clinical Trials (R Jones)en_US
dc.contributor.icrauthorDowsett, Mitchen_US
dc.contributor.icrauthorSmith, Ianen_US
dc.contributor.icrauthorJones, Robinen_US

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