Brachial plexus peripheral nerve sheath tumors (PNSTs): clinical and surgical management in the pediatric population.

PURPOSE: Peripheral nerve sheath tumors (PNSTs) are rare in pediatric patients, especially in the brachial plexus. Research on PNSTs is lacking. This article presents a retrospective cohort study of pediatric patients diagnosed and treated with PNSTs, specifically brachial plexus tumors. METHODS: All pediatric patients intervened in a single center between 2007 and 2023 with brachial plexus tumors were systemically analyzed. RESULTS: Eleven pediatric patients with 14 brachial plexus PNSTs were studied. The gender distribution was 64% female and 36% male, with an average age of 10.7 years. Ninety-one percent had a previous NF-1 diagnosis. Right brachial plexus presented a higher prevalence (64%). Pain, Tinel's sign, and stiffness masses were common during diagnosis. Motor deficits were noted in 43% of the patients. Surgery was indicated for symptoms, particularly pain and rapid growth, increasing malignancy risk. Due to suspected malignancy, an en bloc resection with safety margins was performed. Among the patients, 57% received a histopathological diagnosis of MPNST (malignant peripheral nerve sheath tumor). Treatment included radiotherapy and chemotherapy. Clinical follow-up was conducted for all cases, involving clinical and oncological evaluations for all MPNSTs. CONCLUSIONS: This article present a series of pediatric brachial plexus tumors, especially in NF-1, and emphasizes the importance of thorough evaluation for this group. Swift diagnosis is crucial in pediatrics, enabling successful surgery for small lesions with limited neurological symptoms, improving long-term outcomes. Prompt referral to specialized services is urged for suspected masses, irrespective of neurological symptoms. Benign tumor postsurgical progression shows better outcomes than MPNSTs, with complete resection as the primary goal. Needle-guided biopsy is not recommended.

Core outcomes in nerve surgery: development of a core outcome set for common peroneal (fibular) neuropathy.

OBJECTIVE: Common peroneal (fibular) neuropathy is the most common mononeuropathy of the lower extremity. Despite this, there are surprisingly few studies on the topic, and a knowledge gap remains in the literature. As one attempts to address this knowledge gap, a core outcome set (COS) is needed to guide the planning phases of future studies to allow synthesis and comparability of these studies. The objective of this study was to develop the COS-common peroneal neuropathy (CoPe) using a modified Delphi approach. METHODS: A 5-stage approach was used to develop the COS-CoPe: 1) stage 1, consortium development; 2) stage 2, a literature review to identify potential outcome measures; 3) stage 3, a Delphi survey to develop consensus on outcomes for inclusion; 4) stage 4, a Delphi survey to develop definitions; and 5) stage 5, a consensus meeting to finalize COS and definitions. The study followed the COS-STAndards for Development (COS-STAD) recommendations. RESULTS: The Core Outcomes in Nerve Surgery (COINS) Consortium comprised 23 participants, all neurological surgeons, representing 13 countries. The final COS-CoPe consisted of 31 data points/outcomes covering domains of demographics, diagnostics, patient-reported outcomes, motor/sensory outcomes, and complications. Appropriate instruments, methods of testing, and definitions were set. The consensus minimum duration of follow-up was 12 months. The consensus optimal time points for assessment were preoperatively and 3, 6, 12, and 24 months postoperatively. CONCLUSIONS: The COINS Consortium developed a consensus COS and provided definitions, methods of implementation, and time points for assessment. The COS-CoPe should serve as a minimum set of data that should be collected in all future neurosurgical studies on common peroneal neuropathy. Incorporation of this COS should help improve consistency in reporting, data synthesis, and comparability, and should minimize outcome reporting bias.

Core outcomes in nerve surgery: development of a core outcome set for brachial plexus and upper extremity nerve injuries.

OBJECTIVE: When considering traumatic brachial plexus and upper extremity nerve injuries, iatrogenic nerve injuries, and nontraumatic nerve injuries, brachial plexus and upper extremity nerve injuries are commonly encountered in clinical practice. Despite this, data synthesis and comparison of available studies are difficult. This is at least in part due to the lack of standardization in reporting and a lack of a core outcome set (COS). Thus, there is a need for a COS for adult brachial plexus and upper extremity nerve injuries (COS-BPUE). The objective of this study was to develop a COS-BPUE using a modified Delphi approach. METHODS: A 5-stage approach was used to develop the COS-BPUE: 1) consortium development, 2) literature review to identify potential outcome measures, 3) Delphi survey to develop consensus on outcomes for inclusion, 4) Delphi survey to develop definitions, and 5) consensus meeting to finalize the COS and definitions. The study followed the Core Outcome Set-STAndards for Development (COS-STAD) recommendations. RESULTS: The Core Outcomes in Nerve Surgery (COINS) Consortium comprised 23 participants, all neurological surgeons, representing 13 countries. The final COS-BPUE consisted of 36 data points/outcomes covering demographic, diagnostic, patient-reported outcome, motor/sensory outcome, and complication domains. Appropriate instruments, methods of testing, and definitions were set. The consensus minimum duration of follow-up was 24 months, with the consensus optimal time points for assessment being preoperatively and 3, 6, 12, and 24 months postoperatively. CONCLUSIONS: The COINS Consortium developed a consensus COS and provided definitions, methods of implementation, and time points for assessment. The COS-BPUE should serve as a minimum set of data that should be collected in all future neurosurgical studies on adult brachial plexus and upper extremity nerve injuries. Incorporation of this COS should help improve consistency in reporting, data synthesis, and comparability, and should minimize outcome reporting bias.

Deep Vein Thrombosis in the Setting of Neurofibromatosis Type 1: Case Report

Neurofibromatosis type 1 (NF1) is a genetic syndrome which typically presents with neurological manifestations. Some of the patients may also present with vasculopathies, among which arterial aneurysms and stenosis are the most common. Deep vein thrombosis (DVT) has rarely been described, and, to the best of our knowledge, the present is the first report of DVT due to venous compression by a neurofibroma in the setting of NF1. This is the case of a 23-year-old male with NF1 who experienced DVT due to compression of the left posterior tibial veins by a large tumor arising from the tibial nerve. The DVT was acutely treated with enoxaparin and then with rivaroxaban. Two months after the diagnosis, Doppler ultrasonography showed partial recanalization and persistence of the DVT. The patient was then referred to neurosurgery for surgical resection of the tumor. There were no complications during the procedure, and the patient did not present postoperative neurological deficits. The final histopathological diagnosis was of a benign neurofibroma. After one year of follow-up with vascular surgery, the patient presented no more episodes of DVT. In case there is a tumor compressing the deep vessels of the leg and promoting DVT, surgical resection with microsurgical techniques may be curative.

Evaluation of maize top crosses under two nitrogen levels / Avaliação de top crosses de milho em duas doses de nitrogênio

Maize crops in Brazil have a wide diversity of management systems. There is a large contingent of family agriculture, which uses little or no agricultural inputs, compared to the rural enterprise which uses the most modern production systems. This difference in the management systems is particularly noticeable in relation to consumption of fertilizers, especially nitrogenous ones. Therefore it is necessary to obtain plants with efficient nitrogen (N) use that also respond to applied nitrogen. Thus, the aim of the study was to evaluate the performance of S0:1 progenies, in top crosses, under two nitrogen levels and select the best ones based on responsiveness and efficiency. Sixty seven S0:1 progenies from populations of single cross hybrids were crossed with two testers (T1 - single cross hybrid; T2 - population per se). A hundred and thirty four hybrid progenies plus ten controls were evaluated in two field trials with different levels of nitrogen (one with average levels - 50 kg ha-1 of N - and the other with low levels of nitrogen - 25 kg ha-1 of N) in a 12 x 12 triple lattice design. It is possible to identify and to select progenies from commercial single cross hybrids that are efficient and responsive to nitrogen application. The non-additive effect was as important as the additive effect for grain yield under different nitrogen levels.

A cultura do milho no Brasil tem uma ampla diversidade no sistema de manejo. Há um grande contingente de agricultura tipicamente familiar que usa pouco insumo agrícola, e também empresas rurais que utilizam o que há de mais moderno em sistema de produção. Essa diferença no sistema de manejo fica bem evidenciada no que refere ao consumo de fertilizantes, especialmente os nitrogenados. Por isso, é necessário obter plantas eficientes no uso de nitrogênio (N) e, ao mesmo tempo, que sejam responsivas ao N aplicado. Desse modo, neste trabalho, objetivou-se avaliar a resposta, a diferentes níveis de N, de progênies S0:1 de milho e sua capacidade de combinação, utilizando dois testadores diferentes. Foram utilizadas 67 progênies S0:1, oriundas de híbridos comerciais, em topcross com dois testadores (T1 - híbrido simples; T2 - população per ser das progênies S0:1). Os top crosses foram avaliados, juntamente com 10 testemunhas, em dois experimentos com diferentes níveis de nitrogênio (nível médio - 50 kg ha-1 de N - e outro com nível baixo - 25 kg ha-1 de N), no delineamento experimental látice triplo 12 x 12. Os resultados obtidos permitiram verificar que não ocorreu alteração no comportamento dos top crosses em diferentes doses de nitrogênio, para produtividade de grãos. É possível identificar e selecionar progênies parcialmente endogâmicas responsivas e eficientes na utilização de N, provenientes de híbridos comerciais. Os efeitos não-aditivos foram tão importantes quanto os efeitos aditivos para produtividade de grão sob diferentes níveis de nitrogênios.

Encontro terapêutico: avaliação de uma abordagem integral em pacientes com dispepsia funcional, ensaio clínico controlado aleatorizado / Therapeutic encounter: evaluation of an integral approach in patients with functional dyspepsia, randomized controlled clinical trial

INTRODUÇÃO: Este estudo tem por objetivo avaliar, em pacientes portadores de dispepsia funcional, um tipo de atendimento médico que tem a sustentação de uma base epistemológica mais ampla (encontro terapêutico) comparada com o atendimento médico tradicional embasado no modelo biomédico (consulta médica). Inicia-se com um debate onde são descritas as teorias e definições acerca do tema "pluralismo epistemológico". O autor acredita que este é o alicerce capaz de fornecer a necessária sustentação para o exercício crítico da atividade profissional que se quer mais humanizada e humanista e para uma pesquisa em saúde que consiga integrar os múltiplos saberes. Em seguida, descreve os passos que transformam "consultas" em "encontros terapêuticos". De acordo com o autor essa transformação possibilita o resgate das características de arte da medicina. Arte no sentido de artesanal (de "feita sob medida") ao contrário da biomedicina que é técnica (no sentido de sistematizar, generalizar). MÉTODOS: Trata-se de um ensaio clínico randomizado e controlado por placebo, registrado no ClinicalTrials.gov. Realizado de novembro de 2007 a fevereiro de 2012. Foram recrutados 131 pacientes com dispepsia funcional a partir de 753 voluntários pertencentes ao Ambulatório de Gastroenterologia da Faculdade de Medicina do ABC. Esses pacientes foram divididos em dois grupos A e B, onde o grupo A (n = 63) foi tratado com consultas médicas tradicionais e o grupo B (n = 68) com encontros terapêuticos. Esses dois grupos foram divididos em 4 subgrupos A1, A2, B1 e B2, onde os subgrupos A1 (n = 31) e B1(n = 34) receberam o medicamento omeprazol, A2 (n = 32) e B2 (n = 34) receberam placebo. A todos os pacientes, foi aplicado o Questionário de Sintomas de Dispepsia Funcional (QSDF) no início do estudo. Aos que terminaram o tratamento, o QSDF foi aplicado no final (seis meses após o inicio). A variável desfecho foi definida como sendo a redução de 50% e mais no escore obtido entre a primeira e a...

INTRODUCTION: This study aims to evaluate, in patients with functional dyspepsia, a type of medical care that has the support of a larger epistemological basis (therapeutic encounter) compared with standard medical care grounded in the biomedical model (medical consultation). It begins with a discussion where theories and definitions on the topic "epistemological pluralism" are described. The author believes that this is the foundation capable of providing the necessary support for the critical exercise of professional activity in a more humane and humanistic basis, and for a health research capable of the integration of multiple areas of knowledge. Then he describes the steps that transform "consultation" in "therapeutic encounters." According to the author, this transformation enables the rescue of the characteristics of the art of medicine. Art in the sense of artisanal (the "tailor made") instead of biomedicine that is technical (in the sense of systematic, generalized). METHODS: This was a randomized, placebo-controlled clinical trial, registered in ClinicalTrials.gov., held from November 2007 to February 2012. 131 patients with functional dyspepsia were recruited from 753 volunteers belonging to the Gastroenterology outpatient clinic of Faculdade de Medicina do ABC. These patients were divided into two groups A and B, where group A (n = 63) was treated with traditional medical consultations and group B (n = 68) with therapeutic encounters. These two groups were divided into 4 subgroups A1, A2, B1 and B2, where the subgroups A1 (n = 31) and B1 (n = 34) received omeprazole, A2 (n = 32) and B2 (n = 34) received placebo. All patients answered the Questionnaire Symptoms of Functional Dyspepsia (QSFD) at study entry. Those patients who completed treatment answered the QSFD again in the end (six months after the onset). The outcome variable was defined as a reduction of 50% and more on the score obtained between the first and second...