Accidents involving metals brought into the MRI room are occurring with increasing frequency. The Japan Council for Quality Health Care has released medical safety information about bringing magnetic materials into the MRI room, showing that this is an important safety issue. In our hospital, there were 4 accidents involving metal brought into the MRI room between April 2012 and March 2016. One serious incident was a projectile accident involving scissors carried by a nurse. In response, we have adopted new preventive measures, including specialized uniforms and a color-coding scheme for indicating MRI-safe and MRI-unsafe items (using colored tape, etc.). Here we report on the effect of these accident prevention efforts.

Objective: Lymph node recurrence is extremely rare in cases of stage IA1 squamous cell carcinoma (SCC) of the uterine cervix without lymphovascular space invasion (LVSI). We present two cases of extraregional lymph node recurrence after initial surgery for stage IA1 SCC of the uterine cervix without LVSI.Patients: Both patients initially underwent hysterectomy and developed recurrent extraregional lymph nodes within a few years postoperatively.Case 1: The patient showed no symptoms of recurrence, and follow-up computed tomography (CT) for evaluation of gallstones revealed a para-aortic lymph node (9 mm). The patient subsequently underwent serum SCC antigen testing and CT and was diagnosed with recurrence.Case 2: The patient noticed a right inguinal node swelling, which was evaluated using CT. Both patients survived without relapse for 8 and 4 years, respectively.Conclusion: Although stage IA1 SCC of the uterine cervix without LVSI is associated with a low risk of lymph node recurrence, oncologists should consider the possibility of recurrence in such cases. Evaluation for recurrence is difficult in asymptomatic patients. Serum SCC antigen testing may be a useful biochemical marker before imaging for early detection of recurrence, even in asymptomatic patients.