Analyzing the medical use of cannabis for cancer patients: a critical perspective

The utilization of cannabis in oncology presents a multifaceted approach to addressing the complex challenges associated with cancer treatment. With roots tracing back to ancient medicinal practices, cannabis contains numerous compounds, including cannabinoids like tetrahydrocannabinol (THC) and cannabidiol (CBD), that interact with the body's endocannabinoid system. These interactions offer potential therapeutic benefits, ranging from antiemetic and analgesic effects to the inhibition of cancer growth processes. While clinical evidence supports the efficacy of cannabinoids in managing symptoms and enhancing the quality of life for cancer patients, caution is warranted due to potential interactions with conventional medications. Understanding the mechanisms of action, optimal administration routes, and potential side effects is crucial for integrating cannabis into personalized cancer care plans. By navigating these considerations thoughtfully, medical practitioners can harness the therapeutic potential of cannabis to complement traditional cancer treatments and improve patient outcomes in the field of oncology.

Novelty in improvement of CAR T cell-based immunotherapy with the aid of CRISPR system

Abstract Introduction Chimeric Antigen Receptor (CAR) T cells have tremendous potentials for cancer treatment; however, various challenges impede their universal use. These restrictions include the poor function of T cells in tumor microenvironments, the shortage of tumor-specific antigens and, finally, the high cost and time-consuming process, as well as the poor scalability of the method. Creative gene-editing tools have addressed each of these limitations and introduced next generation products for cell therapy. The clustered regularly interspaced short palindromic repeats-associated endonuclease 9 (CRISPR/Cas9) system has triggered a revolution in biology fields, as it has a great capacity for genetic manipulation. Method In this review, we considered the latest development of CRISPR/Cas9 methods for the chimeric antigen receptor T cell (CAR T)-based immunotherapy. Results The ability of the CRISPR/Cas9 system to generate the universal CAR T cells and also potent T cells that are persistent against exhaustion and inhibition was explored. Conclusion: We explained CRISPR delivery methods, as well as addressing safety concerns related to the use of the CRISPR/Cas9 system and their potential solutions.

Visualization Analysis of Research Hotspots of Breast Cancer Microenvironment Based on CiteSpace and VOSviewer / 肿瘤防治研究

Objective To explore the status of knowledge graph-based research into breast cancer microenvironment and to predict future research hotspots. Methods The literature related to breast cancer microenvironment in recent 20 years was retrieved from CNKI and Web of Science Core Collection database and analyzed with CiteSpace and VOSviewer. Results A total of 825 Chinese articles and 16,221 English articles were retrieved. Visual analysis showed that research focus has gradually shifted from cellular research to molecular research and drug innovation. Cancer stem cells, PD-1, PD-L1, immune checkpoint inhibitors, and nanoparticles are the main subjects of interest in research on breast cancer microenvironment, and the United States has the largest number of studies on breast cancer microenvironment, followed by China and Italy. Conclusion Current research mainly focuses on tumor stemness, immunotherapy, and nanodelivery. Owing to deepening research in this field, the targeting of the breast cancer microenvironment for the prevention of tumor development and metastasis and improvement of tumor prognosis has emerged as a new research direction.

Antitumor Drugs Targeting Mutant p53 Protein / 生物化学与生物物理进展

The p53 protein is an essential tumor suppressor in the human body that plays a critical role in preventing tumor formation by controlling cell cycle arrest and promoting apoptosis. Mutations in the p53 gene are frequently observed in more than 50% of tumor tissues and lead to the generation of mutant p53 proteins, which not only have a dominant-negative effect (DN) that hinders the function of wild-type p53 protein but also have gain-of-function (GOF) effects that stimulate tumor development by regulating cell metabolism, invasion, migration, and other processes. Therefore, mutant p53 protein has become a specific drug target for cancer therapy. However, the lack of a drug-binding pocket and smooth surface of mutant p53 proteins have made them undruggable targets for a long time. In recent years, with the development of high-throughput screening technology and an enhanced understanding of the structure and conformational changes exhibited by mutant p53 proteins, a multitude of small molecule compounds directed against mutant p53 protein have been identified, exhibiting substantial in vitro anti-tumor efficacy. Moreover, some of these compounds have entered clinical trials. This review summarized the direct and indirect strategies for the treatment of cancers targeting mutant p53, with a primary focus on the mechanisms of action of small molecule compounds that reactivate mutant p53 protein or degrade mutant p53 protein. The aim is to provide assistance for the development of innovative drugs targeting mutant p53 protein in the future.

A Survey on Osteoporosis Treatment for Cancer Patients Provided by Designated Cancer Hospitals in Japan

Purpose: This study aimed to understand the details of osteoporosis treatment for cancer patients provided by designated cancer hospitals. Methods: This web-based survey included questions on the evaluation and treatment of osteoporosis in cancer patients provided by physicians in the departments of urology, gynecology, hematology, respiratory medicine, respiratory surgery, gastroenterology medicine and gastroenterology surfery. Results: The gynecology, hematology, breast surgery, and urology departments had high rates of bone densitometry and prescriptions of osteoporosis treatment for cancer patients. The most frequently used selection criteria were age, hormone therapy, and steroid use. Conclusion: Osteoporosis treatment and associated selection criteria for cancer patients is different in each department, so we need to educate the evaluation and treatment of cancer treatment-induced bone loss.

Research Advances in Traditional Chinese Medicine and Natural Products for Cancer Treatment by Targeting Ferroptosis / 医药导报

Ferroptosis is a unique iron-dependent cell death pattern,a novel death phenotype distinct from apoptosis,va-rious forms of necrosis,and autophagy.Numerous active ingredients extracted from traditional Chinese medicine have been found to exert anti-cancer effects by inducing ferroptosis in various cancers.An increasing number of studies have found that the regulation of ferroptosis can influence the sensitivity of tumor cells to drugs and even reverse drug resistance.When combined with chemo-therapy drugs such as cisplatin,5-FU and gemcitabine,some natural products enhance cancer cells'sensitivity to chemothera-peutic drugs by inducing ferroptosis.This paper mainly summarizes traditional Chinese medicine and its natural products that can exert anti-cancer effects by inducing ferroptosis,providing new insights for cancer treatment and drug resistance reversal.Addition-ally,it contributes to exploring the potential advantages of traditional Chinese medicine,thereby expanding its scope of applica-tion.

Calculation of organ dose of 90Y TheraSphere in the treatment of pancreatic cancer / 中国辐射卫生

Objective To calculate the absorbed dose of 90Y TheraSphere in the pancreas and the surrounding sensitive organs after the administration in the treatment of pancreatic cancer through the establishment of an individual voxel model, and to provide technical support for the clinical application of 90Y TheraSphere in the treatment of pancreatic cancer. Methods An individualized voxel model was constructed in Geant4 software based on the CT images of the patient. 12 monoenergetic electron specific absorption fractions (SAFs) in the range of 0.01 to 1 MeV were calculated and validated against the ICRP data. The model and method were used to calculate the absorbed doses in the target organs under uniform and nonuniform distribution of 90Y microspheres in the pancreas. Results The relative errors between the SAF values calculated based on the individualized voxel model and the ICRP data after mass calibration were less than 3.89%. When 90Y was uniformly distributed in the pancreas, the absorbed dose in the pancreas was 4.69 × 10−7 Gy/Bq; the absorbed doses in the liver, kidneys, and spleen were 6.15 × 10−12, 6 × 10−12, and 1.65 × 10−11 Gy/Bq, respectively. When 90Y was distributed within the tumor, the absorbed dose in the tumor was 6.69 × 10−6 Gy/Bq and the absorbed dose in normal pancreas was 5.72 × 10−8 Gy/Bq. The fitted relationship between tumor volume V and administered activity A at the prescribed dose of 120 Gy was quadratic, with relatively low activity required for concentrated administration in the center of the tumor. Conclusion The Monte Carlo dose calculation method based on individual voxel model accurately predicted the absorbed doses in the surrounding sensitive organs (liver, kidneys, and spleen) when 90Y TheraSphere was used to treat pancreatic cancer. These results and the analysis of the factors affecting the drug delivery activity will provide data support for the clinical research of 90Y TheraSphere in pancreatic cancer.

Impact of the COVID-19 Pandemic on Brazilian Head and Neck Surgery Centers

Abstract Objective The outbreak of the COVID-19 pandemic had a considerable impact on the healthcare access, treatment, and follow-up of oncologic patients. The aim of this study was to evaluate how the COVID-19 pandemic has affected consultation and follow-up demand as well as treatment volume at Brazilian Head and Neck Surgery centers. Methods An anonymous online questionnaire was used for collection of data across all Brazilian Head and Neck Surgery Centers across a 3-month period (April‒June 2021). This information included the characteristics of each center, and the perceived self-reported impact of the COVID-19 pandemic on academic activities, residency training, and the diagnosis, treatment, and follow-up of patients with Head and Neck diseases between 2019 and 2020. Results The response rate across the 40 registered Brazilian Head and Neck Surgery Centers was 47.5% (n = 19). The data showed a significant reduction in the total number of consultations (24.8%) and number of attending patients (20.2%) between 2019 and 2020. The total number of diagnostic exams (31.6%) and surgical procedures (13.0%) conducted over this period also decreased significantly. Conclusions The COVID-19 pandemic had a significant national impact on Brazilian Head and Neck Surgery Centers. Future studies should examine the long-term effects of the pandemic on cancer treatment. Level of evidence Evidence from a single descriptive study.

Componentes ético-clínicos presentes en la indicación de tratamiento en mujeres con cáncer de mama según edad de diagnóstico

Objetivo: Evaluar si existen diferencias basadas en la edad en la aproximación diagnóstica y de tratamiento del cáncer de mama. Se analizan aspectos éticos, como justicia, beneficencia y autonomía, en relación a la toma de decisiones. Material y Método: Estudio descriptivo cuantitativo y corresponde a un análisis retrospectivo de la base de datos del Centro de la Mama de Clínica Alemana de Santiago, en la que se analiza información de las mujeres de 70 años o más en relación a motivo consulta, estadio de la enfermedad al momento del diagnóstico y tratamientos recibidos y se la compara con la obtenida del grupo de mujeres menores de 70 años. Resultados: No hay diferencia en la oportunidad de la consulta, en el acceso al diagnóstico ni en el tipo de cirugía entre los dos grupos. Existen diferencias significativas en relación a la indicación de tratamientos adyuvantes como quimioterapia, radioterapia y hormonoterapia. El grupo de mujeres mayores de 70 años reciben menos terapias que las mujeres de menor edad. No existe información respecto a los motivos que expliquen esta diferencia. Discusión: Actualmente, mujeres mayores se encuentran en buenas condiciones generales, con una expectativa de vida mayor a 75 años. Es importante tratar sus enfermedades sin limitar a priori el acceso a protocolos de tratamiento, evitando la discriminación por edad. Conclusión: Se propone incorporar una evaluación geriátrica protocolizada con el objetivo de mejorar la atención de este grupo etario, preservando de esta manera los principios de justicia, beneficencia y autonomía en pacientes mayores.

Objective: To evalúate if there are differences on the diagnostic approach and breast cancer treatment based on women age. We analyze ethical aspects like justice, beneficence and autonomy in regards of decision making. Material and Method: Descriptiva and quantitative study that correspond and analysis of the Data Base of the Breast Cancer Center in Clínica Alemana de Santiago, in which we gather the information of women 70 years or more in relation to consultation motive, illness stage and treatments received, compare with the obtain in the group of women under 70 years. Results: There are no differences in the opportunity to reach consultation, access to diagnosis neither the type of surgery. There are significant differences in considering adjuvant treatment like chemotherapy, radiotherapy and hormonal therapy. The group of women with 70 years or older, receive less treatments than the younger group. There is no information that explains this differences. Discussion: In current days, women of the third and fourth age are in good general conditions and their life expectancy is over 75 years old. It is important to treat their diseases without limiting access to them only because of their age, avoiding this type of discrimination. Conclusion: it is proposed to incorporate a geriatric evaluation to improve quality of clinical attention in this age group, aiming to preserve justice, beneficence and autonomy principles in older patients.

Tailored therapy and bloodless supportive care measures for a Jehovah’s witness with metastatic Ewing sarcoma

A seventeen-year-old Jehovah’s witness with metastatic Ewing sarcoma initially declined cancer therapy due to the risk of life-threatening bone marrow suppression. He then subsequently agreed to other treatment options with bloodless supportive care measures in order to achieve quality of life and long-term control of his disease. This case report adds to the collective knowledge of providing treatment options including bloodless supportive care measures for Jehovah’s witness patients with cancer.

Lipid nanomaterials-based RNA therapy and cancer treatment

We summarize the most important advances in RNA delivery and nanomedicine. We describe lipid nanoparticle-based RNA therapeutics and the impacts on the development of novel drugs. The fundamental properties of the key RNA members are described. We introduced recent advances in the nanoparticles to deliver RNA to defined targets, with a focus on lipid nanoparticles (LNPs). We review recent advances in biomedical therapy based on RNA drug delivery and state-of-the-art RNA application platforms, including the treatment of different types of cancer. This review presents an overview of current LNPs based RNA therapies in cancer treatment and provides deep insight into the development of future nanomedicines sophisticatedly combining the unparalleled functions of RNA therapeutics and nanotechnology.

Research progress of radiation nephropathy / 中华放射医学与防护杂志

Radiotherapy is an important treatment for malignant tumors. However, it is also one cause of damage to local normal tissues, such as radiation nephropathy, which is frequently induced during the radiotherapy of abdominal and pelvic tumors. The exact pathogenesis of radiation nephropathy is still unclear and is believed to be related mainly to factors including oxidative stress, cell aging, and gene changes presently. Moreover, there is a lack of effective treatments for radiation nephropathy. With an increase in the survival of tumor patients, radiation nephropathy has received increasing attention. This article mainly reviewed the research progress of radiation nephropathy from the aspects of pathogenesis and treatments, aiming to provide a reference for the research and clinical diagnosis and treatment of radiation nephropathy.

Human Telomeric i-motif: Its Structure‚ Recognition and Physiological Activity / 中国生物化学与分子生物学报

The human telomeric i-motif (htel-iM) is a unique higher-order DNA structure formed by the cytosine-rich (C) sequences at the end of human telomeres. Studies have shown that htel-iM plays a significant role in the transcriptional regulation of telomeric repeat-containing RNA (TERRA) ‚ maintenance of telomere function and inhibition of telomerase activity. Thus‚ it is closely related to the development and progression of many cancers and is a promising new target for cancer treatment therapy. Compared to other nucleic acid higher-order structures such as G-quadruplexes‚ the stability of htel-iM is much weaker and affected by many factors like buffer pH‚ ionic conditions and molecular crowding environments. Therefore the existence of the iM structures in near neutral physiological conditions has been uncertain for a long time. Recently‚ using in-vitro screened small molecule ligands to selectively recognize and stabilize htel-iM provides a new strategy for the exploration of the biological relevance of htel-iM. Thus it has become a research hotspot to take telomere as a cancer treatment target. However‚ so far the reported small molecule ligands selectively targeting the htel-iM are far from sufficient compared with those targeting other higher-order nucleic acid structures. In this review‚ the discovery and the characteristic of the iM structures are briefly described‚ with an emphasis on the in-vitro affecting factors of the htel-iM structure‚ the reported htel-iM ligands and its biological relevance and regulation mechanisms‚ which will be helpful in further exploration of the htel-iM structure and ligand screening in near physiological conditions‚ and understanding the mechanism and developing novel therapeutic strategies for cancer treatment targeting the htel-iM structures.

The prevalence of COVID-19 infection among gynecologic oncology patients receiving cancer treatment in a COVID-19 referral hospital / Philippine Journal of Obstetrics and Gynecology

Introduction@#Cancer patients are more susceptible to coronavirus disease-19 (COVID-19) infection because they are immunosuppressed by their disease or therapy, most of them have coexisting medical conditions, and they frequently visit hospitals for treatment and surveillance. @*Objective@#The objective of this study was to determine the prevalence of COVID-19 infection among gynecologic oncology patients receiving treatment in a COVID-19 referral hospital. @*Materials and Methods@#A descriptive, cross-sectional study involving 47 gynecologic cancer patients receiving treatment from June 2020 to December 2020 was performed. All patients underwent SARS-CoV-2 reverse transcription-polymerase chain reaction (RT-PCR) swab test and symptom and exposure assessment before the start of cancer treatment. Patients with negative SARS-CoV-2 RT-PCR swab test results received their planned treatment, and a repeat swab test and triage assessment were done midtreatment and after treatment. @*Results@#Five (10.6%) patients had positive baseline SARS-CoV-2 RT-PCR swab results, but all proceeded with treatment after negative results were obtained. Only 1 (2.13%) patient had a positive SARS-CoV-2 RT-PCR swab test result at midtreatment. All patients had no COVID-19-associated symptoms and none of them tested positive for COVID-19 infection posttreatment. @*Conclusion@#The prevalence of COVID-19 infection among gynecologic cancer patients receiving cancer treatment is 2.13%. All patients who had positive SARS-CoV-2 RT-PCR swab test results at baseline or midtreatment were able to continue and complete treatment. There were no severe clinical events or mortalities among those affected with COVID-19 infection.

Head and Neck Cancer Survivors’ Perceptions of Cancer Treatment and Posttraumatic Growth

@#Introduction: Cancer patients’ perception on the treatment they received is vital to determine their adherence to cancer treatment, but important data on how this variable affects posttraumatic growth (PTG) experience by cancer patients is lacking. This cross-sectional study aimed to evaluate the degree of PTG among a cohort of head and neck cancer (HNC) survivors who were within first year of diagnosis and determined the association between perception of cancer treatment received (expectation and satisfaction with cancer treatment received and the feeling about the adverse effects) and PTG controlling for socio-demographic and clinical characteristics. Methods: HNC survivors were recruited from two oncology referral centres, and they were administered socio-demographic and clinical characteristics questionnaire, the Malay version of the Cancer Therapy Satisfaction Questionnaire (CTSQ) (to assess the satisfaction, expectation and feeling about the adverse effects of cancer treatment received) and the Malay version of the Posttraumatic Growth Inventory-Short Form (PTGi-SF) (to measure the degree of PTG). Results: A total of 200 HNC survivors participated in the study. The mean total PTGI-SF score was 39.5 (standard deviation [SD] = 9.3). Greater degree of positive expectation of cancer treatment and satisfaction with cancer treatment received significantly contributed to higher level of PTG, whereas feeling about side effects of treatment was not associated with PTG, after controlling for socio-demographic and clinical characteristics. Conclusion: Incorporating psychosocial interventions (such as education on cancer treatment and counselling) into the treatment regimen may facilitate development of PTG and hence, safeguard the mental well-being of HNC patients.

Research progress in the application of hybrid cell membrane biomimetic nano-drug delivery system in cancer treatment / 国际生物医学工程杂志

The biomimetic strategy of using the cell membrane-coated nanoparticles can retain the physical and chemical properties of the nanoparticles and show the biological characteristics of the source cell membrane, which can further enhance the role of the nanodrug in tumor treatment. A hybrid cell membrane is the fusion of two or more different types of cell membranes. A hybrid cell membrane can endow nanoparticles with multiple biofunctions derived from the source cells compared with a single cell membrane. Hybrid cell membranes provide a foundation to stimulate extensive research into multifunctional biomimetic nano-drug delivery system (NDDS), which is expected to broaden the application of biomimetic nanotechnology in drug delivery systems. In this review paper, the types of hybrid cell membrane used to construct nano-drug delivery systems, the preparation and characterization methods, and cancer treatment research progress in recent years were reviewed.

Orange-derived extracellular vesicles nanodrugs for efficient treatment of ovarian cancer assisted by transcytosis effect

Extracellular vesicles (EVs) have recently received much attention about the application of drug carriers due to their desirable properties such as nano-size, biocompatibility, and high stability. Herein, we demonstrate orange-derived extracellular vesicles (OEV) nanodrugs (DN@OEV) by modifying cRGD-targeted doxorubicin (DOX) nanoparticles (DN) onto the surface of OEV, enabling significantly enhancing tumor accumulation and penetration, thereby efficiently inhibiting the growth of ovarian cancer. The obtained DN@OEV enabled to inducement of greater transcytosis capability in ovarian cancer cells, which presented the average above 10-fold transcytosis effect compared with individual DN. It was found that DN@OEV could trigger receptor-mediated endocytosis to promote early endosome/recycling endosomes pathway for exocytosis and simultaneously reduce degradation in the early endosomes-late endosomes-lysosome pathway, thereby inducing the enhanced transcytosis. In particular, the zombie mouse model bearing orthotopic ovarian cancer further validated DN@OEV presented high accumulation and penetration in tumor tissue by the transcytosis process. Our study indicated the strategy in enhancing transcytosis has significant implications for improving the therapeutic efficacy of the drug delivery system.

Effect of radiotherapy on the differentiation and osteogenic activity of mesenchymal stem cells on dental implants / Efeito da radioterapia na diferenciação e atividade osteogênica de células-tronco mesenquimais em implantes dentários

Objective: to evaluate the differentiation and gene expression of transcripts related to osteogenesis in a primary culture of Mesenchymal Stem Cells (MSCs) derived from rat femurs submitted to radiotherapy and the installation of pure titanium implants. Material and Methods: fifty-four rats received titanium implants in both femurs and were divided into three groups: Control: implant surgery (C); Implant + immediate irradiation (IrI), and Implant + late irradiation (IrL). Euthanasia occurred 3, 14, and 49 days after surgery. The bone marrow MSCs from the femurs were isolated and cultivated. The cell viability, total protein content, alkaline phosphatase (ALP) activity, and the formation of mineralization nodules and cellular genotoxicity were analyzed. The gene expression of Alkaline Phosphatase (phoA), Collagen 1 (COL1), Runt-related transcription factor 2 (RUNX2), Osterix (OSX), Osteopontin (OPN), Integrin ß1(ITGB1), Bone Sialoprotein (BSP), Osteonectin (SPARC), Osteocalcin (Bglap), Transforming Growth Factor ß-type (TGF-ß), Granulocyte Macrophage Colony Stimulating Factor (GM-CSF), Interleukin-6 (IL-6), Apolipoprotein E (APOE) and Prostaglandin E2 synthase (PGE2) were evaluated by qRT- PCR. Results: ionizing radiation suppresses the gene expression of essential transcripts for bone regeneration, as well as cellular viability, as observed in the IrI and IrL groups. Conclusion: although this can lead to the loss of osseointegration and failure of the implant, the MSCs showed more activity at 49 days than at 3 and 14 days. (AU)

Objetivo: avaliar a diferenciação e expressão gênica de transcritos relacionados à osteogênese em cultura primária de MSCs derivadas de fêmures de ratos submetidos à radioterapia e instalação de implantes de titânio puro. Material e Métodos: cinquenta e quatro ratos receberam implantes de titânio em ambos os fêmures e foram divididos em três grupos: Controle: cirurgia de implante (C); Implante + irradiação imediata (IrI) e Implante + irradiação tardia (IrL). A eutanásia ocorreu 3, 14 e 49 dias após a cirurgia. As MSCs de medula óssea dos fêmures foram isoladas e cultivadas. Foram analisadas a viabilidade celular, teor de proteína total, atividade da fosfatase alcalina (ALP), formação de nódulos de mineralização e genotoxicidade celular. A expressão gênica de Fosfatase Alcalina (phoA), Colágeno 1 (COL1), fator de transcrição relacionado a Runt 2 (RUNX2), Osterix (OSX), Osteopontina (OPN), Integrina ß1 (ITGB1), Sialoproteína Óssea (BSP), Osteonectina (SPARC), Osteocalcina (Bglap), Fator de Crescimento Transformador tipo ß (TGF-ß), Fator Estimulante de Colônia de Granulócitos-Macrófagos (GM-CSF), Interleucina-6 (IL-6), Apolipoproteína E (APOE) e Prostaglandina E2 sintase (PGE2) foram avaliados por qRT-PCR. Resultados: a radiação ionizante suprime a expressão gênica de transcritos essenciais para a regeneração óssea, bem como a viabilidade celular, como observado nos grupos IrI e IrL. Conclusão:embora isso possa levar à perda da osseointegração e falha do implante, as MSCs apresentaram maior atividade aos 49 dias do que aos 3 e 14 dias (AU)

Early breast cancer: concept and therapeutic review

SUMMARY OBJECTIVE: Breast cancer treatment has evolved significantly over the years, both in terms of local and systemic approaches. Halsted's radical mastectomy gave way to modified mastectomies and to conservative surgeries, along with breast reconstruction and repair. Although the use of new drugs has directly increased the survival of patients submitted to adjuvant or neoadjuvant systemic therapies, the de-escalation of drugs may also be beneficial in numerous cases. Therefore, breast cancer treatment must be increasingly customized and assessed using a multidisciplinary approach. This study aimed to review the concept and therapy of early breast cancer. METHODS: A narrative review of the literature was carried out in the PubMed database in December 2022, where the keywords for the searches were as follows: early breast cancer, surgical treatment of breast cancer, systemic treatment of breast cancer, neoadjuvant chemotherapy in breast cancer, adjuvant treatment of luminal breast cancer, early triple negative tumor, and early positive Her-2 tumor. Articles that were historically important in the treatment of breast cancer and articles that impacted management with scientific relevance were selected for this review. DISCUSSION: As new evidence continues to update existing knowledge, breast cancer treatment is becoming increasingly personalized and must now take into account the different tumor variants and their clinical stages, the age of patients and relevant comorbidities, as well as personal expectations and desires. CONCLUSION: This literature review of current studies shows that the primary therapy for patients with early breast cancer continues to be surgery, although a customized and multidisciplinary approach is now required.

Relación entre competencia para el cuidado domiciliario y la presencia de infecciones respiratorias en niños con tratamiento oncológico en el contexto de la pandemia por COVID-19 / Relationship between competence for home care and the presence of respiratory infections in children with cancer treatment in the context of the COVID-19 pandemic / Relação entre a proficiência para dar os cuidados em casa e a presença de infecções respiratórias em crianças sob tratamento oncológico no contexto da pandemia de COVID-19

Introducción: Los cuidados domiciliarios para los niños con enfermedades neoplásicas, representan costos sociales y económicos, además de posibles riesgos de infección. Por lo que, la importancia del cuidado de los menores ante las infecciones respiratorias virales durante la infancia radica en asegurar las correctas medidas de prevención del contagio. El objetivo de este estudio fue determinar la relación existente entre la competencia para el cuidado domiciliario y la presencia de infecciones respiratorias en los niños con tratamiento oncológico. Método: Estudio de enfoque cuantitativo, diseño correlacional, de corte transversal y descriptivo. La muestra se compone de 75 díadas. La competencia del cuidado domiciliario se midió con el instrumento CUIDAR. El análisis estadístico se realizó con el programa estadístico SPSS versión 25, utilizando estadística descriptiva y estadística inferencial no paramétrica. Resultados: La prevalencia de infecciones respiratorias fue del 4% para los menores con cuidadores con un nivel alto de competencia para el cuidado domiciliario, 12% para el nivel medio y 21.3%para el nivel bajo, mostrando dependencia entre las variables de estudio(X2=14.4, gl= 2, p=0.001). Además, se determinó una asociación (r=-.439, p<.001)entre las mismas. Discusión: La competencia con un nivel alto en los cuidados domiciliarios, supone un adecuado desempeño del rol como cuidador familiar con efecto en calidad de vida de la díada cuidador familiar-persona con cáncer. Conclusiones: A mayor competencia para el cuidado, menor la prevalencia de infecciones respiratorias; existiendo una relación entre la competencia para el cuidado domiciliario y la presencia de infecciones respiratorias en los niños con tratamiento oncológico.

Introduction: Home care for children with neoplastic diseases represents social and economic costs, as well as possible risks of infection. Therefore, the importance of caring for minors in the face of viral respiratory infections during childhood lies in ensuring the correct measures to prevent contagion. The objectiveof this study was to determine the relationship between competence for home care and the presence of respiratory infections in children undergoing cancer treatment. Method: Study of quantitative approach, correlational, cross-sectional and descriptive design. The sample consists of 75 dyads. Home care competence was measured with the CARE instrument. Statistical analysis was performed with the statistical program SPSS version 25.0, using descriptive statistics and non-parametric inferential statistics. Results: The prevalence of respiratory infections was 4% for children with caregivers with a high level of home care competence, 12% for the medium level and 21.3% for the low level, showing dependence between the study variables (X2=14.4, gl= 2, p=0.001). In addition, an association (r=-.439, p<.001) was determined between them. Discussion: The competence with a high level in home care supposes an adequate performance of the role as family caregiver with effect on quality of life of the family caregiver-person with a cancer dyad. Conclusions:The higher the caregiving competence, the lower the prevalence of respiratory infections; there is a relationship between home caregiving competence and the presence of respiratory infections in children undergoing cancer treatment.

Introdução: Os cuidados domiciliares para as crianças com doenças neoplásicas representam custos sociais e econômicos, além dos possíveis riscos de infecção. Por isso, a importância de tomar conta delas no que diz respeito às infecções respiratórias virais durante sua meninice radica em segurar as medidas adequadas para prevenir o contágio. O objetivo deste estúdio foi determinar a relação entre as infecções respiratórias nas crianças sob tratamento contra o cancro e a habilitação para lhes fornecer os cuidados em casa. Método: Estúdio da abordagem quantitativa, desenho correlacional, de corte transversal e descritivo. A amostra se compõe de 75 díades. A habilitação dos cuidados em casa foi medida com o instrumento TOMAR CONTA. A análise estatística se realizou com o programa estatístico SPSS, versão 25. Foi utilizada a estatística descritiva e a estatística inferencial não paramétrica. Resultados: A prevalência de infecções respiratórias foi de 4% para as crianças que receberam os cuidados em casa com um alto nível de efetividade; 12%, quando a efetividade dos cuidados foi intermediária; e para a baixa chegou até 21,3%. Isto demonstra a correlação entre as variáveis de estudo (X2= 14,4; gl= 2; p= 0,001). Além disso, se determinou uma associação (r= -,439; p<,001) entre elas. Discussão:A aptidão adequada para fornecer os cuidados em casa aponta que o responsável pela família desempenhou bem seu papel, o que fez com que houvesse repercussões positivas na qualidade de vida da díade "cuidador familiar-pessoa com câncer". Conclusões: Quanto maior é a proficiência para dar os cuidados, menor é o impacto das infecções respiratórias. Existe uma relação entre a habilitação para os cuidados em casa e a presença de infecções respiratórias nas crianças que recebem tratamentos oncológicos