Karina Cox1, Sian Taylor-Phillips2, Nisha Sharma3, Jennifer Weeks1, Philippa Mills1, Ali Sever4, Adrian Lim5, Isobel Haigh3, Mohamed Hashem1, Tania de Silva6, Keshthra Satchithananda4, Mengxing Tang7, Matthew Wallis8. 1. 1 Breast Surgery, Peggy Wood Breast Unit, Maidstone Hospital, Hermitage Lane , Peggy Wood Breast Unit, Maidstone Hospital, Hermitage Lane , Kent, Maidstone , UK. 2. 2 WMS - Population Evidence and Technologies, University of Warwick , University of Warwick , Coventry , UK. 3. 3 Breast Radiology, Leeds Breast Unit, St James's University Hospital, Beckett Street , Leeds Breast Unit, St James's University Hospital, Beckett Street , Leeds , UK. 4. 4 Breast Radiology, Breast Care Unit, Kings College Hospital, Ground floor, Cheyne Wing, Denmark Hill , Breast Care Unit, Kings College Hospital, Ground floor, Cheyne Wing, Denmark Hill , Brixton, London , UK. 5. 5 Breast Radiology, Breast Unit, Charing Cross Hospital, Fulham Palace Road , Breast Unit, Charing Cross Hospital, Fulham Palace Road , London , UK. 6. 6 School of Surgery, Health Education Kent Surrey and Sussex , Health Education Kent Surrey and Sussex , London , UK. 7. 7 Department of Bioengineering, Imperial College London , Imperial College London , London , UK. 8. 8 Breast Radiology, Breast Unit, Addenbrooke's Treatment Centre , Breast Unit, Addenbrooke's Treatment Centre , Cambridge , UK.
Abstract
OBJECTIVE: To compare the experience of four UK Centres in the use of intradermal microbubbles and contrast enhanced ultrasound (CEUS) to pre-operatively identify and biopsy sentinel lymph nodes (SLN) in patients with breast cancer. METHODS: In all centres, breast cancer patients had a microbubble/CEUS SLN core biopsy prior to axillary surgery and patients in Centres 1 and 2 had a normal greyscale axillary ultrasound. Data were collected between 2010 and 2016; 1361 from Centre 1 (prospective, sequential), 376 from Centre 2 (retrospective, sequential), 121 from Centre 3 (retrospective, selected) and 48 from Centre 4 (prospective, selected). RESULTS: SLN were successfully core biopsied in 80% (Centre 1), 79.6% (Centre 2), 77.5% (Centre 3) and 88% (Centre 4). The sensitivities to identify all SLN metastases were 46.9% [95% confidence intervals (CI) (39.4-55.1)], 52.5% [95% CI (39.1-65.7)], 46.4% [95% CI (27.5-66.1)] and 45.5% [95% CI (16.7-76.6)], respectively. The specificities were 99.7% [95% CI (I98.9-100)], 98.1% [95% CI (94.5-99.6)], 100% [95% CI (93.2-100%)] and 96.3% [95% CI (81-99.9)], respectively.The negative predictive values were 87.0% [95% CI (84.3-89.3)], 84.5% [95% CI (78.4-89.5)], 86.9% [95% CI (82.4-90.3)] and 86.2% [95% CI (78.4-91.5)], respectively. At Centres 1 and 2, 12/730 (1.6%) and 7/181 (4%), respectively, of patients with a benign microbubble/CEUS SLN core biopsy had two or more lymph node (LN) macrometastases found at the end of primary surgical treatment. CONCLUSION: The identification and biopsy of SLN using CEUS is a reproducible technique. Advances in knowledge: In the era of axillary conservation, microbubble/CEUS SLN core biopsy has the potential to succeed surgical staging of the axilla.
OBJECTIVE: To compare the experience of four UK Centres in the use of intradermal microbubbles and contrast enhanced ultrasound (CEUS) to pre-operatively identify and biopsy sentinel lymph nodes (SLN) in patients with breast cancer. METHODS: In all centres, breast cancerpatients had a microbubble/CEUS SLN core biopsy prior to axillary surgery and patients in Centres 1 and 2 had a normal greyscale axillary ultrasound. Data were collected between 2010 and 2016; 1361 from Centre 1 (prospective, sequential), 376 from Centre 2 (retrospective, sequential), 121 from Centre 3 (retrospective, selected) and 48 from Centre 4 (prospective, selected). RESULTS: SLN were successfully core biopsied in 80% (Centre 1), 79.6% (Centre 2), 77.5% (Centre 3) and 88% (Centre 4). The sensitivities to identify all SLN metastases were 46.9% [95% confidence intervals (CI) (39.4-55.1)], 52.5% [95% CI (39.1-65.7)], 46.4% [95% CI (27.5-66.1)] and 45.5% [95% CI (16.7-76.6)], respectively. The specificities were 99.7% [95% CI (I98.9-100)], 98.1% [95% CI (94.5-99.6)], 100% [95% CI (93.2-100%)] and 96.3% [95% CI (81-99.9)], respectively.The negative predictive values were 87.0% [95% CI (84.3-89.3)], 84.5% [95% CI (78.4-89.5)], 86.9% [95% CI (82.4-90.3)] and 86.2% [95% CI (78.4-91.5)], respectively. At Centres 1 and 2, 12/730 (1.6%) and 7/181 (4%), respectively, of patients with a benign microbubble/CEUS SLN core biopsy had two or more lymph node (LN) macrometastases found at the end of primary surgical treatment. CONCLUSION: The identification and biopsy of SLN using CEUS is a reproducible technique. Advances in knowledge: In the era of axillary conservation, microbubble/CEUS SLN core biopsy has the potential to succeed surgical staging of the axilla.
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