Initial Surgical Experience Evaluating Early Tolerance and Toxicities in Patients Undergoing Accelerated Partial Breast Irradiation Using the Contura® Multi Lumen Balloon Breast Brachytherapy Catheter

Abstract

We reviewed our surgical experience with the Contura® Multi Lumen Balloon breast brachytherapy catheter used to deliver accelerated partial breast irradiation and determined short-term treatment efficacy, cosmesis, and toxicity. Forty-six patients undergoing breast conserving therapy, including the use of Contura® catheter, were analyzed. Thirty-four Gray were delivered in 10 fractions. Fourteen patients had stage 0, 24 had stage I, and 8 had stage II breast cancer. Catheters were placed with a closed cavity technique. Median minimum skin spacing was 10 mm (range, 2-18 mm). Median maximum skin doses were 99.7 per cent of the prescription dose. Nine patients were treated with a skin spacing ≤5 mm (2 patients with 2 mm skin spacing). The percentage of patients with excellent/good cosmesis at 6 (n = 26) and 12 (n = 13) months was 100 per cent, respectively. Patient tolerance was assessed on a scale of 0-10 (0 = no pain, 10 = requiring narcotic analgesics). Pain was graded ≤3 in 98 per cent of patients at catheter insertion and 84 per cent at catheter removal. Four breast infections (8.8%) and one symptomatic seroma developed. Adjuvant accelerated partial breast irradiation using the Contura Multi Lumen Balloon exhibited similar toxicities to standard single lumen, single dwell balloon brachytherapy with improvements in dosimetric capabilities allowing the treatment of patients with skin spacing ≤5 mm.