Utilization of Iron (III)-doped Nanoshells for In vivo Marking of Nonpalpable Tumors Using a VX2 Rabbit Model
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Background: We aimed to evaluate the potential for ultrasound (US) visible biodegradable nanoshells (NS) as an alternative to wire-guided localization for nonpalpable tumors in vivo.
Methods: VX2 tumor was injected in bilateral thighs of 22 New Zealand rabbits and after 5 to 10 days, 1 tumor was marked with a wire as a control and the contralateral tumor was injected with 1 mL of 500 nm gas-filled silica NS under Doppler US. Tumors were excised after 24 hours. Chi-square was used for significance, P = .05.
Results: One rabbit was excluded on postoperative day 1 due to equipment failure, no ill effects were observed from the NS. The NS were used to localize and resect 100% of marked tissue, 4/21 wires were displaced (P < .05).
Conclusions: We have shown that preoperatively injected US visible silica NS can be successfully used to mark nonpalpable tumors in vivo more consistently than WL.
Voss R, Ward E, Ojeda-Fournier H, Blair S Ann Surg Oncol. 2018; 25(12):3740-3746.
PMID: 30178390 PMC: 6277056. DOI: 10.1245/s10434-018-6707-z.