Severe obesity remains one of the most important symptoms of Prader–Willi Syndrome (PWS), and controlling weight represents a crucial point in the therapeutical approach to the syndrome. We present an overview of different progressive patterns of growth that involve controlling weight in PWS. Mechanisms involved in the development of obesity and in preventive and therapeutic strategies to control weight gain are discussed. Early diagnosis, a controlled diet regimen, regular physical activity, follow-up by multidisciplinary teams, and hormonal treatment improved the management of excessive weight gain. In selected cases, a surgical approach can be also considered. Controlling weight in PWS remains a challenge for pediatricians. The importance of consulting different healthcare specialists, starting from the neonatal and pediatric age, is also considered as a crucial approach to controlling weight, as well as to limiting and preventing the onset of obesity and its complications.

Inflammatory status is one of the main drivers in the development of non-communicable diseases (NCDs). Specific unhealthy dietary patterns and the growing consumption of ultra-processed foods (UPFs) may influence the inflammation process, which negatively modulates the gut microbiota and increases the risk of NCDs. Moreover, several chronic health conditions require special long-term dietary treatment, characterized by altered ratios of the intake of nutrients or by the consumption of disease-specific foods. In this narrative review, we aimed to collect the latest evidence on the pro-inflammatory potential of dietary patterns, foods, and nutrients in children affected by multifactorial diseases but also on the dietetic approaches used as treatment for specific diseases. Considering multifactorial diet-related diseases, the triggering effect of pro-inflammatory diets has been addressed for metabolic syndrome and inflammatory bowel diseases, and the latter for adults only. Future research is required on multiple sclerosis, type 1 diabetes, and pediatric cancer, in which the role of inflammation is emerging. For diseases requiring special diets, the role of single or multiple foods, possibly associated with inflammation, was assessed, but more studies are needed. The evidence collected highlighted the need for health professionals to consider the entire dietary pattern, providing balanced and healthy diets not only to permit the metabolic control of the disease itself, but also to prevent the development of NCDs in adolescence and adulthood. Personalized nutritional approaches, in close collaboration between the hospital, country, and families, must always be promoted together with the development of new methods for the assessment of pro-inflammatory dietary habits in pediatric age and the implementation of telemedicine.

Background: Parvovirus B19 (PVB19) is a small, nonenveloped, single-stranded DNA virus commonly causing asymptomatic infections or mild, flu-like symptoms. In children, PVB19 can lead to various clinical conditions, including erythema infectiosum, arthropathy, transient aplastic crisis and papular-purpuric eruptions, among others. Methods: We present 3 pediatric cases treated at Luigi Sacco University Hospital in Milan, Italy, in March 2024, each demonstrating distinct manifestations of PVB19 infection. Case 1 involved a 7-year-old girl with a maculopapular rash and panniculitis-like symptoms. Case 2 described an 8-year-old boy with a maculopapular rash, vasculitis component and mild thrombocytopenia. Case 3 focused on a 7-year-old girl with petechial and purpuric eruptions and a mild decrease in platelets. Serological tests confirmed PVB19 infection in all cases. Results: The discussed cases highlight the heterogeneous clinical spectrum of PVB19 infection and emphasize its potential to cause thrombocytopenia even in healthy children. The recent surge in PVB19 cases in Europe, aligned with known epidemiological cycles, underscores the importance of vigilance in diagnosis, particularly during peak seasons. Additionally, concerning the role of serological testing in the diagnostic process, the potential for cross-reactivity among viral antigens is pointed out. Conclusion: PVB19 is a common infection with a broad range of clinical presentations. Awareness of its potential complications, including thrombocytopenia, even in nonimmunocompromised children, is crucial. Moreover, understanding the epidemiological patterns of PVB19 can aid in anticipating and managing outbreaks, thus minimizing its impact on pediatric health.

In patients with cancer, tumor- and treatment-induced immunosuppression are responsible for a four-fold increase in morbidity and mortality caused by influenza and invasive Streptococcus pneumoniae infections compared to the general population. The main oncology societies strongly recommend vaccination in patients with cancer to prevent these infections. However, vaccine hesitancy is a main concern in this population. The aim of this study was to assess the feasibility of in-hospital vaccination for patients under anticancer treatment and their family members (FMs) against influenza and pneumococcal infections during the COVID-19 pandemic in order to increase vaccine coverage. This was a single-center, prospective, observational study conducted at the Department of Oncology of Luigi Sacco University Hospital (Milan, Italy) between October 2020 and April 2021. The main primary outcome was the incidence of influenza-like illness (ILI) and pneumococcal infections. The main secondary outcome was safety. A total of 341 subjects were enrolled, including 194 patients with cancer and 147 FMs. The incidence of ILI was higher among patients than among FMs (9% vs. 2.7%, OR 3.92, p = 0.02). Moreover, two subjects were diagnosed with pneumococcal pneumonia. The most frequent vaccine-related AEs were pain in the injection site (31%) and fatigue (8.7%). In conclusion, this hospital-based vaccination strategy was feasible during the COVID-19 pandemic, representing a potential model to maximize vaccine coverage during a public health emergency.