Breast tissue expanders (TEs) with magnetic infusion ports are labeled “MR Unsafe.” Therefore, patients with these implants are typically prevented from undergoing magnetic resonance imaging (MRI). We report a patient with a total submuscular breast TE who inadvertently underwent an MRI exam. She subsequently developed expander exposure, requiring explantation and autologous reconstruction. The safety profile of TEs with magnetic ports and the use of MRI in patients with these implants is surprisingly controversial. Therefore, we present our case report, a systematic literature review, and propose procedural guidelines to help ensure the safety of patients with TEs with magnetic ports that need to undergo MRI exams.

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Introduction The Q Aspiration catheter design has shown increased aspiration force in bench studies 1 . The objective of this first clinical study was to assess safety and performance of the Q™ Catheter in a real-world setting. The study was a multi-center, observational, post market study utilizing the Q Catheter as first-line therapy during mechanical thrombectomy in Spain. Methods Patients with AIS treated with Q as first line therapy between March 2019 and January 2020 were identified at four centers in Spain. Inclusion criteria included 18-85 years of age, anterior or posterior LVO, ASPECTs 6-10 and within 8 hours of onset/last known well. Baseline demographics, procedural data, post procedure neuroimaging, and clinical outcomes were reported. A follow up visit was conducted to assess mRS. Results There were 45 patients included. Average age at presentation was 72.4 and 53.3% were male. Thrombolytic therapy was given in 46.7% (21/45) and NIHSS was 14.4 (range 1-26). Final mTICI 2b-3 was achieved in 93% of patients (42/45). First pass success of mTICI 2b-3 with only a Q Catheter was achieved in 49% (21/43), increasing to 56% (24/43) when a stent retriever was used as an anchor. Overall successful revascularization using the Q Catheter was 77% (33/43). ENT was 2% (1), sICH rate was 2% (1), and mortality during the study period was 13% (6). At follow-up, 55.5% of subjects had a mRS of 0-2. Conclusion The Q Catheter showed good deliverability and revascularization rates in this real-world setting with no safety concerns.