Key clinical point: Marking sentinel lymph nodes (SLN) with superparamagnetic iron oxide (SPIO) nanoparticles led to a substantial proportion of patients with ductal carcinoma in situ (DCIS) of the breast avoiding an upfront SLN dissection (SLND).
Major finding: Upfront SLND could be avoided in 78.3% of patients after marking SLN with SPIO nanoparticles. Among patients receiving delayed SLND, the detection rate was significantly better with SPIO vs radioisotope ( 99Tc), both with (98.2% vs 63.6%) and without the concomitant use of blue dye (92.7% vs 50.9%; both P < .001).
Study details : Findings are from a prospective, multicenter cohort study including 254 patients with DCIS.
Disclosures: This study was funded by the Uppsala University. One author declared serving on an advisory board and receiving institutional grants and speaker honoraria from several sources.
Source: Karakatsanis A et al. Delayed sentinel lymph node dissection in patients with a preoperative diagnosis of ductal cancer in situ by preoperative injection with superparamagnetic iron oxide (SPIO) nanoparticles: The SentiNot study. Ann Surg Oncol. 2023 (Jan 31). Doi: 10.1245/s10434-022-13064-0