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Impact of lobular carcinoma in situ on local recurrence in breast cancer treated with breast conservation therapy: a systematic review and meta‐analysis
Author(s) -
Harris Christopher G.,
Eslick Guy D.
Publication year - 2021
Publication title -
anz journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 70
eISSN - 1445-2197
pISSN - 1445-1433
DOI - 10.1111/ans.16671
Subject(s) - medicine , breast cancer , lumpectomy , lobular carcinoma , oncology , odds ratio , meta analysis , confidence interval , radiation therapy , invasive lobular carcinoma , cancer , adjuvant therapy , mastectomy , ductal carcinoma , invasive ductal carcinoma
Background Lobular carcinoma in situ (LCIS) is a known risk factor for breast cancer of unclear significance when detected in association with invasive carcinoma. This meta‐analysis aims to determine the impact of LCIS on local recurrence risk for individuals with breast cancer treated with breast conservation therapy to help guide appropriate management strategies. Methods We identified relevant studies from five electronic databases. Studies were deemed suitable for inclusion where they compared patients with invasive breast cancer and concurrent LCIS to those with breast cancer alone, all patients underwent breast conservation therapy (lumpectomy with adjuvant radiation therapy) and local recurrence was evaluated. Recurrence data were pooled by use of a random‐effects model. Results From 1488 citations screened by our search, nine studies were deemed suitable for inclusion. These studies comprised 990 cases and 12 870 controls. Median follow‐up time was 104 months. There was a significantly increased risk of overall local recurrence of breast cancer for individuals with LCIS in association with breast cancer following breast conservation therapy (pooled odds ratio (pOR) 1.73; 95% confidence interval (CI) 1.10–2.71; P = 0.018). The risk of local recurrence was not significantly increased at 5 years (pOR 1.00; 95% CI 0.49–2.04; P = 0.995) and 10 years (pOR 1.52; 95% CI 0.72–3.23; P = 0.275). Conclusion Individuals with LCIS in association with invasive breast cancer have an increased risk of local recurrence following breast conservation therapy. This supports consideration of increased medical surveillance and exploration of further risk reduction strategies for such patients.