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Los incendios forestales en bosques montañosos pueden modificar las tasas de infiltración y de escorrentía, lo cual aumenta el arrastre de sedimentos ladera abajo. Por lo tanto, es urgente diseñar e implementar técnicas de control de sedimentos en laderas incendiadas. Una metodología sencilla y económica es la construcción de fajinas (i.e., una empalizada de forma cilíndrica construida con ramas trenzadas). Nuestro objetivo fue evaluar la efectividad de colocar distintos números de fajinas (0, 2 y 3) en distintas posiciones de la laderapara controlar el arrastre de sedimentos en una ladera quemada (Serranía de Tres Cerritos, Salta-Argentina). Encontramos que a mayor número de fajinas, y ubicándolas en las partes bajas e intermedias de la ladera, el perfil de cenizas fue más profundo, lo que evidencia un mejor control del arrastre de sedimentos. Si bien el costo logístico de construir un sistema con hileras de 3 fajinas es un 50% más altoqueotro con 2 hileras de fajinas, la ganancia en el control de sedimentos al trabajar con 3 fajinas fue superior enun 64%. Recomendamos implementar un sistema con 3 (o más) fajinas para controlar el arrastre de sedimentos y la erosión del suelo en laderas quemadas en próximos eventos de incendios en bosques secos de montaña. DOI: https://doi.org/10.25260/EA.17.27.3.0.574

Breast cancer is the second most common cancer in Peruvian women. Due to limitations in national breast cancer screening programs, especially in rural areas, more than 50% of cases of breast cancer in Peru are diagnosed in advanced stages. In collaboration with a local clinic registered as a nongovernmental organization (CerviCusco), RAD-AID International aims to create a sustainable diagnostic structure to improve breast cancer screening in Cuzco. With the support of local, national, and international partners that have collaborated in analyzing radiological resources, raising awareness in the population, acquiring equipment, training clinical staff, and building referral networks, our teams of radiologists, included in the RAD-AID team, have participated in training CerviCusco staff in breast ultrasound, thus enabling additional training for radiology residents through a regulated international collaboration., (Copyright © 2021 SERAM. All rights reserved.)

Aim: to study the feasibility and value of "Targeted Axillary Dissection" (TAD) in cN1 breast cancer (BC) patients undergoing neoadjuvant chemotherapy (NACT), in order to avoid unnecessary axillary lymph node dissection (ALND)., Materials and Methods: Design: Prospective observational study., Inclusion Criteria: Patients with histologically confirmed cN1 staging BC and treated with NACT between January 2016 and August 2019 who accomplished clinical response., Method: Fine-Needle Aspiration (FNA) positive axillary nodes were marked with a metallic clip prior to neoadjuvant treatment. All patients were summited to TAD and ALND. Analysis of data: We performed [1]: a feasibility analysis of clinical, radiological and pathological variables, as well as difficulties and complications of the TAD [2]; a diagnostic test study of the sentinel lymph node biopsy (SLNB), clipped lymph node biopsy (BCLIP) and their combination (TAD), using ALND as the Gold Standard., Results: 60 patients were included. 43 patients (71.7%) had a complete clinical lymph node response to NACT. Neither limitations nor complications in clip placement were found. Intraoperative location of the clipped node was problematic in 7 cases (11.7%). The pathological complete response rate (pCR) was 30.5% (18 patients) and ypN0 staging rate was 38.3% (23 patients). Sensitivity values of each technique were: SLNB: 80.9% (95%CI: 61.8-100); BCLIP: 80.8% (95%CI: 63.7-97.8); TAD: 92.6% (95%CI: 80.9-100) with negative predictive values of: SLNB: 84.6% (95%CI: 68.8-100); BCLIP: 81.0% (95%CI: 63.7-97.8); TAD: 91.3% (95%CI: 77.6-100)., Conclusion: TAD is feasible and valid to rule out axillary metastatic involvement in cN1 breast cancer patients who respond to NACT., (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Aim: To determine predictive factors of axillary lymph node dissection (ALND) results in breast cancer (BC) patients undergoing neoadjuvant chemotherapy (NACT), and subsequent staging using Targeted Axillary Dissection (TAD)., Material and Method: Case-control study between January 2016 and August 2019. Patients with BC, cN1 staging, marked with a metallic clip prior to NACT, and subsequently staged with TAD and ALND were included. They were divided into 2 groups: ALND patients with or without metastatic involvement (group 1 and group 2, respectively). We carried out a univariate analysis comparing clinical, radiological, surgical and pathological variables, and a logistic regression, (dependent variable: positive result of ALND; independent variables: number of suspicious lymph nodes in diagnostic ultrasound, positive hormone receptors, HER2 positive, complete clinical-radiological response to NACT, positive TAD, and biopsy of ≤2 nodes in TAD). A score for prediction of a metastatic ALND was proposed, with an internal validation study., Results: 60 patients were included: Group 1: 33 (55.0%); Group 2: 27 (45.0%). Tumor size (Odds Ratio (OR) = 1.67; 95%CI 1.02-2.74), number of suspected nodes in ultrasound (OR = 2.20; 95%CI 1.01-4, 77), HER2 positive (OR 0.04; 95%CI 0.003-0.54), clinical-radiological response to NACT (OR = 0.07; 95%CI 0.01-0.75), and positive TAD (OR 15.48; 95%CI 1.68-142.78) were independent predictors of a positive result in ALND. We developed a "positive ALND predictive score", with good calibration (Hosmer-Lemeshow test: p = 0.65), and discrimination (AUC = 0.93; 95% CI 0, 87-0.99), with highest Youden index (0.7) at cut-off point of 17% risk of positive ALND (sensitivity = 100%; specificity = 70%)., Conclusion: Tumor size, number of suspected nodes, positive HER2, response to NACT, and metastatic TAD are independent predictors of ALND. The predictive score for positive ALND would be a good indicator to safely omit ALND., (Copyright © 2021 Elsevier Ltd. All rights reserved.)

Breast cancer is the second most common cancer in Peruvian women. Due to limitations in national breast cancer screening programs, especially in rural areas, more than 50% of cases of breast cancer in Peru are diagnosed in advanced stages. In collaboration with a local clinic registered as a nongovernmental organization (CerviCusco), RAD-AID International aims to create a sustainable diagnostic structure to improve breast cancer screening in Cuzco. With the support of local, national, and international partners that have collaborated in analyzing radiological resources, raising awareness in the population, acquiring equipment, training clinical staff, and building referral networks, our teams of radiologists, included in the RAD-AID team, have participated in training CerviCusco staff in breast ultrasound, thus enabling additional training for radiology residents through a regulated international collaboration., (Copyright © 2021 SERAM. All rights reserved.)

Targeted axillary dissection (TAD) consists of a new axillary staging technique that combines sentinel lymph node biopsy (SLNB) and clipped lymph node biopsy (CLNB) in the same surgery, in order to re-stage patients with breast cancer and positive axillary lymph nodes undergoing neoadjuvant chemotherapy (NAQT). Prior to the NAQT, the affected lymph node is punctured and a solid marker is left inside echo-guided, in order to biopsy it in the subsequent surgery. There are numerous types of markers: metallic (steel, titanium or polyglycolic acid clips), radioiodine or ferromagnetic seeds, which differ in the method of location (wire, gamma-detection or magnetic probe). The aim of this study is to perform a systematic review about the current status of the TAD, as well as to explain the different techniques and types of axillary marking, based on the current available evidence., (Copyright © 2020 AEC. Publicado por Elsevier España, S.L.U. All rights reserved.)

Aim: To study the feasibility and validity of ultrasound-guided pre-chemotherapy marking of metastatic axillary lymph nodes followed by targeted axillary dissection (TAD), in breast cancer patients undergoing neoadjuvant chemotherapy (NACT)., Material and Method: Prospective diagnostic test study conducted between January 2016 and March 2018. Patients with breast cancer and indication for NACT, cN1 or cN2 axillary staging, were included. A clip was placed in the affected lymph node prior to NACT. A sentinel lymph-node biopsy (SLNB) and a clipped lymph-node biopsy (BCLIP) were conducted, followed by axillary lymph node dissection (ALND). Location rate (LR) and negative predictive value (NPV) were evaluated, taking SLNB, BCLIP and their combination (TAD) as evaluated tests and metastatic involvement in the ALND specimen as the gold standard., Results: Twenty-three patients were included in the study. Sentinel lymph node could only be detected in 19 cases (LR = 80.61%), whereas BCLIP was successful in 22 (LR = 95.65%). The sentinel lymph node coincided with the marked lymph node in 14 patients (60.9%). We found a NPV for the SLNB of 0.85 (95%CI: 0.61-1.0), whereas for TAD it was 1.00 (95%CI: 0.74-1.0)., Conclusion: TAD is a feasible test for axillary restaging after NACT, with a higher success rate than SLNB., (Copyright © 2019 Elsevier Ltd. All rights reserved.)

Nephrogenic systemic fibrosis is a fibrosing disorder that affects patients with impaired renal function and is associated with the administration of gadolinium-based contrast media used in MRI. Despite being in a group of drugs that were considered safe, report about this potentially serious adverse reaction was a turning point in the administration guidelines of these contrast media. There has been an attempt to establish safety parameters to identify patients with risk factors of renal failure. The close pharmacovigilance and strict observation of current regulations, with special attention being paid to the value of glomerular filtration, have reduced the published cases involving the use of gadolinium-based contrast media. In a meeting between radiologists and nephrologists we reviewed the most relevant aspects currently and recommendations for its prevention.

Intracystic papillary carcinoma is an uncommon noninvasive breast cancer with an excellent prognosis. We report the case of a 74-year-old man. Of the diagnostic tests performed, ultrasonography and pneumocystography were useful for establishing a diagnostic suspicion, however, puncture cytology was inaccurate. Excisional biopsy was necessary to confirm the disease, but also to indicate that local treatment was sufficient.