U p to 20% of health care personnel (HCP) were found to be infected with coronavirus disease (COVID-19) 1 in the outbreak in northern Italy. 2 Recommendations on patient and HCP protection have been made, such as postponing procedures, triage, use of personal protective equipment (PPE), and creation of differentiated in-hospital pathways. 3,4 However, several barriers against the adoption of these strategies exist, including cultural factors and shortages of medical resources; therefore, there are few reports of real-world experiences and outcomes with their adoption. 5 The aim of this survey was to investigate the burden of COVID-19 on endoscopic activity in a high-risk area of COVID-19 outbreak, approaches to evaluating patients, adoption and compliance of HCP with protective measures, and initial possible viral transmission outcomes from endoscopy units within a large, community-based setting (both between patients and HCP and between HCP). MethodsThe study was conducted as a survey between March 16 and March 21, 2020. Directors of emergency departments in highrisk areas of northern Italy (Supplementary Figure 1) were invited by e-mail to complete a questionnaire (Figure 1 and Supplementary Table 1). Participation was voluntary. Additional methodology is provided in the Supplementary Material. Results Characteristics of the Endoscopy UnitsA total of 42 endoscopy units were invited, of which 41 participated (97.6%). Most respondents (n ¼ 37, 90.2%) were from high-volume endoscopy units, for a total of 968 endoscopy personnel, including 323 endoscopists, 496 nurses, and 149 health care assistants. Changes in Endoscopy Activity Related to Coronavirus Disease 2019All endoscopy units had patients diagnosed with COVID-19 in their hospital. All but 1 center (40/41, 97.6%) reduced Infection Prevention and Control Measures for Coronavirus Disease 2019Regarding the preventive measures taken after the first Italian case (February 18, 2020), 5 (12.2%) endoscopy units did not take any measures, 29 (70.7%) endoscopy units adopted a triage for risk stratification of COVID-19 infection, 7 (17.1%) endoscopy units decreased endoscopic See editorial on page 36.

The evaluation of patients with symptoms recurrent after disc surgery is a difficult diagnostic problem. The most common causes are recurrent herniation and postoperative scarring; routine x-ray and myelographic differentiation between herniation and scarring is difficult or impossible. High resolution computed tomography (CT) has shown some results in the evaluation of postoperative patients, but the role of epidural fibrosis in failed back surgery syndrome (FBSS) is not clear. Some knowledge of the "normal" CT physiological healing and scarring after disc surgery is necessary. We scanned 20 asymptomatic operated patients and 20 patients with recurrent sciatic nerve pain after disc surgery who did not have bony stenosis, recurrent disc herniation, or other causes of FBSS. Our observations showed no important differences in the fibrosis demonstrated by CT between symptomatic and asymptomatic patients. The degree and type of fibrosis are not related to recurrent symptoms.

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The authors have developed a radiosurgical technique based on multiple arc irradiations. The target is fixed to the rotational isocenter of a Varian 4 MV linear accelerator. The first irradiation is carried out while the radiating source is rotating on a 100–140° arc. The patient is then rotated around a vertical axis passing through the target, and arc irradiations are repeated in different angular positions. By this technique it is possible to obtain very steep dose gradients at the borders of the target volume. High doses are usually delivered in two shots.

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