Outcomes for women with minimal-volume ductal carcinoma in situ completely excised at core biopsy Journal Article

Authors: Muhsen, S.; Barrio, A. V.; Miller, M.; Olcese, C.; Patil, S.; Morrow, M.; Van Zee, K. J.
Article Title: Outcomes for women with minimal-volume ductal carcinoma in situ completely excised at core biopsy
Abstract: Background: Overdiagnosis and overtreatment of ductal carcinoma in situ (DCIS) are concerns, especially for women with low-volume, screen-detected DCIS. This study aimed to evaluate the outcomes for such patients. Methods: Women who had minimal-volume DCIS (mDCIS, defined as DCIS diagnosed by core biopsy but with no residual disease on the surgical excision) treated with breast-conserving surgery from 1990 to 2011 were identified. Ipsilateral and contralateral breast events (IBE and CBE) were compared by competing-risk (CR) analysis. Kaplan–Meier (KM) estimates and log-rank tests were used to evaluate covariates. Results: The study identified 290 cases of mDCIS. The median age of the patients was 53 years. Radiation therapy (RT) was performed for 27.6% and endocrine therapy for 16.2% of the patients. The median follow-up period was 6.8 years. Overall, the IBE rates were 4.3% at 5 years and 12.3% at 10 years. Among the women not receiving RT, the 5- and 10-year IBE rates (5.4 and 14.5%) were higher than the CBE rates (1.8 and 2.7%). Among those receiving RT, the IBE rates (1.5 and 6.0%) were lower than the CBE rates (4.1 and 15.6%). The women receiving RT trended toward significantly lower IBE rates (p = 0.07). Age, grade, and endocrine therapy were not significantly associated with IBE risk. Conclusions: Among the patients with mDCIS who did not receive RT, the IBE risk was substantially higher than the CBE risk, demonstrating that even DCIS of very low volume is associated with clinically relevant disease. The finding that the IBE risk was greater than the CBE risk supports current strategies that treat DCIS as a precursor rather than a risk marker. Women with mDCIS are not at negligible risk for IBE in the absence of adjuvant therapy. © 2017, Society of Surgical Oncology.
Keywords: adult; treatment outcome; middle aged; cancer surgery; excision; major clinical study; cancer radiotherapy; outcome assessment; cancer incidence; risk assessment; cancer hormone therapy; partial mastectomy; intraductal carcinoma; breast biopsy; human; female; article; minimal volume ductal carcinoma in situ
Journal Title: Annals of Surgical Oncology
Volume: 24
Issue: 13
ISSN: 1068-9265
Publisher: Springer  
Date Published: 2017-12-01
Start Page: 3888
End Page: 3895
Language: English
DOI: 10.1245/s10434-017-6043-8
PROVIDER: scopus
PMCID: PMC5697712
PUBMED: 28828599
Notes: Article -- Export Date: 1 December 2017 -- Source: Scopus
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MSK Authors
  1. Sujata Patil
    412 Patil
  2. Andrea Veronica Barrio
    43 Barrio
  3. Monica Morrow
    477 Morrow
  4. Kimberly J Van Zee
    249 Van Zee
  5. Shirin Muhsen
    27 Muhsen
  6. Cristina Olcese
    22 Olcese
  7. Megan Elizabeth Miller
    2 Miller