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Purpose: There is controversy about the necessity of nighttime appendectomy. The aim of this study was to determine whether timing of appendectomy performance plays a role on postoperative complications. Methods: A retrospective single-center comparative study was performed in children who underwent surgery for acute appendicitis between 2017-2021. Patients were divided into groups based on the time slot in which surgery was performed: morning (8:00h-15:00h), afternoon (15:00h-22:00h) and night (22:00h-08:00h). Demographics, intraoperative data, length of hospital stay and postoperative complications were analyzed and compared.Results: A total of 1643 patients were included: 337 were operated in the morning, 751 in the afternoon and 555 at night. We found no demographic differences. When comparing the intraoperative data, no differences were observed in the percentage of complicated appendicitis. Night group patients presented a higher percentage of open appendectomies (64.5%) when compared to afternoon (49.6%) and morning (46.2%) groups (p<0.001). Surgery time was also signi cantly shorter in the night group (45.2min ± 18,9min) (p<0.001). There were no differences in length of hospital stay, postoperative complications rate or readmission rate.Conclusion: These results show that in our institution time slot in which the appendectomy is performed has no consequences in postoperative outcomes and complications.

BACKGROUND Surgical intervention is usually a traumatic event that causes stress and anxiety in the pediatric patient and the family environment. To reduce the harmful effects of presurgical anxiety, parental presence during induction of anesthesia (PPIA) is one of the more notable interventions used in medical centers. However, data on this measure are difficult to evaluate and often face resistance from healthcare staff. AIM To analyze the perception of the healthcare workers after the implementation of a PPIA program. METHODS A survey was developed and sent by email to all the healthcare staff working in the children’s area of a tertiary hospital. It consisted of 14 items divided into positive aspects of PPIA and negative aspects of PPIA evaluated with the use of a Likert scale (1 to 5). The demographics of the respondents were included in the data collected. The answers to the questions were interpreted through the Net Promoter Score (NPS). The statistical analysis compared the differences in the responses to each question of the survey made by the different groups of health personnel included. RESULTS A total of 141 surveys were sent out, with a response rate of 69%. Of the total number of responses, 68% were from women and 32% from men. The average age of the participants was 42.3 ± 10.6 years. As for the positive questions about the PPIA, 83% had an NPS > 50, and only one had a score between 0 and 50, which means that the quality of the service was rated as excellent or good by 100% of the respondents. On the other hand, 100% of the negative questions about the PPIA had a negative NPS. Responses to the question “PPIA increases patient safety” were significantly different ( P = 0.037), with a lower percentage of pediatric surgeons (70%) thinking that PPIA increased patient safety, compared with anesthesiologists (90%), nursing (92%), and other medical personnel (96%). CONCLUSION The personnel who participated in the PPIA program at our center were in favor of implementation. There were no validated arguments to support worker resistance to the development of the PPIA.

Congenital infantile fibrosarcoma (CIF) is a rare tumor in children that occurs in the first years of life. It usually arises in the extremities but some cases affect the trunk, neck, abdomen, or retroperitoneum. Surgical resection has been traditionally the treatment of choice but the development of genomic analysis and targeted therapies has shed light on new therapeutic options.We present two patients with a congenital mass, one in the abdominal cavity (1-month-old) and the second in the left lower extremity respectively (2-months-old). In both cases, the clinical and radiological findings showed heterogeneous masses with rapidly progressive growth. MRI in the first patient exhibited an abdominal mass surrounding the aorta and inferior vena cava associated with a giant infrarenal aortic aneurysm. CT-guided biopsy was performed with pathological findings of fibrosarcoma and ETV6-NTRK3 gene fusion. The second patient underwent open biopsy also with histopathological diagnosis of fibrosarcoma and the same mutation in the TRK gene (NTRK3). Targeted therapy with a specific TRK inhibitor, larotrectinib, was started in both patients. Periodical controls were made by ultrasound or MRI, and after a few weeks of treatment, both children showed significant decrease in the mass. By the second and third months after starting the treatment, both tumors disappeared. The first patient is now 15-months-old and the second one is 8-months-old.Larotrectinib is a novel targeted therapy with excellent results in CIF but long-term outcomes are limited to establish it as a gold standard treatment.