The three types of neurofibromatosis, namely type 1, type 2, and schwannomatosis, are generally associated with various benign tumors affecting the skin and the nervous system. On rare occasions, especially in patients with neurofibromatosis type 1 (NF1), malignant neoplasms may also be present, several of them possessing a more aggressive course than in individuals without this syndrome. As such, a clear delineation between the three variants of neurofibromatosis is crucial to establish the correct diagnosis and management, as well as predict the neoplasm-related outcomes. Neurofibromin, the principal product of the NF1 gene, is a potent inhibitor of cellular proliferation, having been linked to several key signaling pathways involved in tumor growth. Therefore, it may provide a useful therapeutic target for tumor management in these patients. In this article, we want to present the association between deficiency of neurofibromin and the consequences of the lack of this protein leading to different kinds of malignant tumors. The therapy is still uncertain and most therapeutic options are in development or clinical trials.

Atopic dermatitis (AD) is mainly considered an allergy, exacerbated by allergic factors. Is there evidence to suggest the existence of autoimmune components in the pathophysiology of the illness? Studies in the literature that dealt with the occurrence of autoimmunity in children with AD were analyzed. We followed the studies published in PubMed for 10 years, from 2001 to 2021. Clinical signs and symptoms were similar to other autoimmune diseases, having periods of remission and relapses. Other correlations between AD and autoimmune diseases have been described, and patients with AD can also present with a wide range of autoimmune comorbidities. Three major factors contribute to the pathogenesis of AD: damage of the skin barrier, disorders of the immune response, and imbalances of the skin microbiome—all based on genetic changes and influenced by environmental factors. Predominant activation of Th 2 cells, with the increase of Th 1, Th 17, and Th 22 subsets, promotes skin inflammation. All this evidence suggests that AD might be classified as an autoimmune disease, not just as an allergic reaction.

Background: Itching is one of the major and mandatory signs of atopic dermatitis (AD) in children. Interleukin 31 (IL-31) is strongly involved in the genesis of pruritus. In our study, 68 patients aged 0–18 years with proven AD were followed clinically. The role of IL-31 in pruritus as clinical manifestation of AD is known but its etiopathogenetic mechanism is not well known. Methods: Serum was collected from 31 patients with moderate and severe forms of AD to determine IL-31 and its correlation with activity and severity of the disease. We also studied 30 healthy patients to compare the results of determinations. The IL-31 value was determined using the sandwich enzyme-linked-immunosorbent serologic assay (two antibodies assay). The IL-31 values were expressed as picograms per milliliter (pg/mL) and compared with activity and severity of the disease. Results: The IL-31 value was much higher in patients with AD compared to the control group. The mean value of findings was 1600 pg/mL compared to the control group with an average of 220 pg/mL. The IL-31 values were positively correlated with the severity and activity of the disease. Conclusions: The results of our pediatric study established the involvement of IL-31 in the pathophysiology of AD. IL-31 could be a marker of AD track.

Food allergy (FA) is a condition with a growing incidence and is a constant concern for the medical world and healthcare providers. With potential symptoms including anaphylaxis, in the event of an allergic reaction the patient’s life may well be endangered. The diagnosis of FA is a continuous challenge because mild cases tend to be ignored or diagnosed late and young children with allergies are cared for by parents, who are not always able to accurately interpret symptoms. It is very important to be able to differentiate FAs from food intolerance and toxic reactions to food. An accurate diagnosis is required to provide personalized management of an FA. More sophisticated and accurate diagnostic tests, including component diagnosis and epitope reactivity, allow the provision of a directed diagnosis, a more accurate therapeutic approach, and a useful prognostic evaluation. Tests used in current practice include the specific search for serum IgE, elimination diets, oral food challenges, single, blind, and double-blind (DBPCFC) tests, as well as skin tests. The risk of anaphylaxis can be assessed by molecular diagnostics/component-resolved diagnosis (CRD) and by conducting a basophilic activation test (BAT). These tests allow a planned, personalized treatment based on molecular and clinical profiles. CRD can determine the individual profile of allergic molecular reactivity and enable the formulation of a prognostic judgment. Our article highlights the importance of knowing the immune mechanisms, diagnostics, and immunotherapies in FAs. Starting from observing exposure to food allergens, to identifying allergic reactions, analysing the severity of clinical manifestations, noting the possibilities of diagnosis, and illustrating adequate management strategies.

Upper gastrointestinal bleeding (UGB) in children is a potentially life-threatening condition that represents a challenge for pediatricians and pediatric surgeons. It is defined as bleeding from any location within the upper esophagus to the ligament of Treitz. UGB can have many causes that vary with age. The impact on the child is often proportional to the amount of blood lost. This can range from mild bleeding that is unlikely to cause hemodynamic instability, to massive bleeding that requires admission to the intensive care unit. Proper and prompt management are very important factors in reducing morbidity and mortality. This article aims to summarize current research regarding the diagnosis and treatment of UGB. Most of the data used in the literature published on this subject is extrapolated from adulthood.