The impact of genomic testing on the recommendation for radiation therapy in patients with ductal carcinoma in situ: A prospective clinical utility assessment of the 12-gene DCIS score™ result.
J Surg Oncol
; 111(8): 935-40, 2015 Jun.
Article
em En
| MEDLINE
| ID: mdl-26031501
ABSTRACT
BACKGROUND AND OBJECTIVES:
Twenty percent of breast cancers are ductal carcinoma in situ (DCIS), with 15-60% having a local recurrence (LR) after surgery. Radiotherapy reduces LR by 50% but has not impacted survival. The validated Oncotype DX(®) 12-gene assay (DCIS Score) provides individualized 10-year LR estimates. This is the first study to assess whether DCIS Score impacts physicians' recommendations for radiation.METHODS:
Ten sites enrolled women (9/2012-2/2014) with DCIS eligible for breast-conserving therapy, excluding patients with invasive carcinoma and planned mastectomy. Prospective data collected included clinicopathologic factors, DCIS Score assay, and treatment recommendation before and after the assay result was known.RESULTS:
In 115 patients (median age 61 years; 74.8% postmenopausal), median DCIS size was 8 mm; 20% were nuclear grade 1, 46.1% grade 2; 64.4% reported necrosis. 86.1% were ER+, 79.1% PR+ (immunohistochemistry assay). Median DCIS Score 29 (range 0-85). Pre-assay, 73% (95%CI 64.0-80.9%) had radiotherapy recommendations vs. 59.1% (95%CI 49.6-68.2%) post-assay (P= 0.008). Physicians rated DCIS Score as the most impactful factor in planning treatment.CONCLUSIONS:
The radiotherapy recommendation changed from pre-assay to post-assay 31.3% (95%CI 23.0-40.6%) of the time--a clinically significant change. This study supports the clinical utility of the DCIS Score and indicates that the test provides additional, individualized information on LR risk.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias da Mama
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Carcinoma Intraductal não Infiltrante
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Recidiva Local de Neoplasia
Tipo de estudo:
Etiology_studies
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Guideline
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Observational_studies
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Risk_factors_studies
Limite:
Adult
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Aged
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Aged80
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Female
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Humans
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Middle aged
Idioma:
En
Revista:
J Surg Oncol
Ano de publicação:
2015
Tipo de documento:
Article