The Small- Series in the Zero-Dimensional () Model: Constructive Expansions and Transseries.

We consider the zero-dimensional quartic () vector model and present a complete study of the partition function (, ) and its logarithm, the free energy (, ), seen as functions of the coupling on a Riemann surface. We are, in particular, interested in the study of the transseries expansions of these quantities. The point of this paper is to recover such results using constructive field theory techniques with the aim to use them in the future for a rigorous analysis of resurgence in genuine quantum field theoretical models in higher dimensions.

Invasive Inguinal Lymph Node Recurrence of a Perineal Rhabdomyosarcoma.

Rhabdomyosarcoma (RMS) is an aggressive soft tissue sarcoma derived from embryonic mesenchymal tissue. RMS can be found anywhere in the body, including the head and neck, extremities, pelvis, and genitourinary tract. Perineal-RMS is a rare and aggressive form of RMS.

Chyloperitoneum in a toddler on peritoneal dialysis.

Chyloperitoneum is an uncommon diagnosis in peritoneal dialysis (PD) patients. While admitted for emesis and feeding intolerance, a 16-month-old male on PD developed milky-colored dialysate with increased triglycerides, indicating chyloperitoneum. In adult PD patients, chyloperitoneum can indicate potentially life-threatening pathologies including malignancies and liver or heart disease.

Impact of the COVID-19 Pandemic Onset on the Early Careers of Pediatric Oncology Health Professionals and Researchers: A Report From the Children's Oncology Group Young Investigators Committee, Young SIOP Network, and Young SIOPE.

Introduction: The COVID-19 pandemic onset had a global debilitating impact on individuals and on burgeoning careers. In 2021, the Children's Oncology Group Young Investigators Committee, Young SIOP (International Society of Paediatric Oncology) Network, and Young SIOPE (European Society for Paediatric Oncology) co-sponsored a survey to explore the impacts of the first year of the pandemic on early-career pediatric oncology professionals with respect to working practices, productivity, professional and career development, personal wellbeing, and changing childcare needs.

Methods: The survey comprised demographic, multiple-choice, and free-text questions, and was distributed via email and social media with English, French, and Spanish versions available.

Legal Involvement in Pediatric Cancer Treatment Refusal: A Qualitative Study.

Objectives: To characterize the spectrum of legal options considered in cases of treatment refusal, nonadherence, and abandonment (TRNA); clinicians' thought processes regarding legal intervention; and perceived consequences of legal involvement.

Methods: We conducted in-depth, semistructured interviews with 30 pediatric oncologists between May and September of 2019 regarding experiences with TRNA. The interview guide covered types of conflicts encountered; factors and strategies considered in response; effects of TRNA cases, personally and professionally; the role of ethical frameworks and legal requirements; and resources needed to manage TRNA cases.