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Deforestation in Latin America in the 2000s predominantly occurred outside of typical mature forests

The Innovation 2024年第3期5卷 88-98页

作者： Zhiyu Zhang Wenjian Ni Shaun Quegan Jingming Chen Peng Gong Luiz carlos Estraviz Rodriguez Huadong Guo Jiancheng Shi Liangyun Liu Zengyuan Li Yating He Qinhuo Liu Yosio Shimabukuro Guoqing Sun Key Laboratory of Remote Sensing and Digital Earth Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Shijingshan DistrictBeijing 100049China Chinal of mathematics and Statistics University of SheffieldSheffield S37RHUK Department of Geography and Program in Planning University of TorontoTorontoON M5S 3G3Canada Department of Earth Sciences and Department of Geography University of Hong KongHong KongChina Forest Science Department Luiz de Queiroz College of AgricultureUniversity of São PauloAv.Pádua Dias11Piracicaba 13418-900Brazil National Space Science Center Chinese Academy of SciencesBeijing 100190China Institute of Forest Resource Information Techniques Chinese Academy of ForestryBeijing 100091China Research Institute of Forest Policy and Information Chinese Academy of ForestryBeijing 100091China Remote Sensing Department National Institute for Space Research(INPE)Av.dos Astronautas 1758São Josédos Campos 12227-010Brazil Department of Geographical Sciences University of MarylandCollege ParkMD 20742USA

The role of tropical forests in the global carbon budget remains controversial,as carbon emissions from deforestation are highly *** high uncertainty arises from the use of either fixed forest carbon stock density or maps generated from satellite-based optical reflectance with limited sensitivity to biomass to generate accurate estimates of emissions from *** space missions aiming to accurately map the carbon stock density rely on direct measurements of the spatial structures of forests using lidar and *** found that lost forests are special cases,and their spatial structures can be directly measured by combining archived data acquired before and after deforestation by space missions principally aimed at measuring ***,using biomass mapping,we obtained new estimates of carbon loss from deforestation ahead of forthcoming space ***,using a high-resolution map of forest loss and the synergy of radar and lidar to estimate the aboveground biomass density of forests,we found that deforestation in the 2000s in Latin America,one of the severely deforested regions,mainly occurred in forests with a significantly lower carbon stock density than typical mature forests.

关键词： forest Latin lidar

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Landform Instability and Land-use Dynamics in Tropical High mountains, Central mexico

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Journal of mountain Science 2012年第3期9卷 414-430页

作者： GARCíA-romero Arturo ACEVES-QUESADA José Fernando ARREDONDO-LEóN carlos Departamento de Geografía Física Instituto de Geografía Universidad Nacional Autónoma de México. Circuito exterior s/n Ciudad Universitaria 04510 Mexico Distrito Federal Mexico Unidad Académica de Estudios Regionales de la Coordinación de Humanidades Universidad Nacional Autónoma de México

This investigation is an analysis of the influence of landform instability on the distribution of land-use dynamics in a hydrographical basin, located in the mexican Volcanic Belt mountain range (central mexico), currently affected by substantial changes in land use and deforestation. A landform map was produced, in addition to seven attribute maps - altimetry, drainage density, slope, relief energy, potential erosion, geology and tectonics - which were considered as factors for determining landform instability through multi-criteria Evaluation Analysis. Likewise, the direction and rhythm of land-use dynamics were analyzed in four dates - between 1976 and 2000 - and cross tabulations were made between them, in order to analyze the trends and processes of land-use dynamics. Afterwards, the databases obtained were cross tabulated with the landform variables to derive areas, percentages and correlation indices. In the study area, high-instability landforms are associated with most ancient volcanic and sedimentary landforms, where high altitude, drainage density, slope and potential to develop gravitational and fluvial processes are the major factors favouring a land-use pattern, dominated by the conservation of extensive forest land, abandonment of human land use and regeneration of disturbed areas. In contrast, low-instability landforms correspond to alluvial plains and lava hills covered by pyroclasts, where low potential erosion to develop fluvial processes, added to water and soil availability and accessibility, have favoured a land-use pattern dominated by the expansion of agroforestry plantations and human settlements, showing a marked trend towards either intensification or permanence of the current land use and with little abandonment and regeneration.

关键词： Landform instability multi-criteriaEvaluation Analysis Land-use change and processes Tuxpan River Basin

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Typhoon-and pollution-driven enhancement of reactive bromine in the mid-latitude marine boundary layer

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National Science Review 2024年第4期11卷 93-101页

作者： Shanshan Wang Qinyi Li Ruifeng Zhang Anoop Sharad mahajan Swaleha Inamdar Nuria Benavent Sanbao Zhang Ruibin Xue Jian Zhu Chenji Jin Yan Zhang Xiao Fu Alba Badia Rafael P.Fernandez carlos A.Cuevas Tao Wang Bin Zhou Alfonso Saiz-Lopez Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Department of Environmental Science and Engineering Fudan University Institute of Eco-Chongming(IEC) Department of Atmospheric Chemistry and Climate Institute of Physical Chemistry Blas CabreraCSIC Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Environment Research Institute Shandong University Centre for Climate Change Research Indian Institute of Tropical MeteorologyMinistry of Earth Sciences Department of Chemistry University of Colorado Boulder Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolTsinghua University Sostenipra Research Group Institute of Environmental Science and Technology(ICTA)Universitat Autonoma de Barcelona(UAB) Institute for Interdisciplinary Science (ICB) National Research Council (CONICET)

Tropospheric reactive bromine is important for atmospheric chemistry,regional air pollution,and global *** studies have reported measurements of atmospheric reactive bromine species in different environments,and proposed their main sources,***-salt aerosol（SSA）,oceanic biogenic activity,polar snow/ice,and *** and other strong cyclonic activities（***） induce abrupt changes in different earth system processes,causing widespread destructive ***,the role of typhoons in regulating reactive bromine abundance and sources remains ***,we report field observations of bromine oxide（BrO）,a critical indicator of reactive bromine,on the Huaniao Island（HNI）in the East China Sea in July *** observed high levels of BrO below 500 m with a daytime average of9.7±4.2 pptv and a peak value of ～26 pptv under the influence of a *** field measurements,supported by model simulations,suggest that the typhoon-induced drastic increase in wind speed amplifies the emission of SSA,significantly enhancing the activation of reactive bromine from SSA *** also detected enhanced BrO mixing ratios under high NOxconditions（ppbv level） suggesting a potential pollution-induced mechanism of bromine release from *** elevated levels of atmospheric bromine noticeably increase ozone destruction by as much as ～40% across the East China *** the high frequency of cyclonic activity in the northern hemisphere,reactive bromine chemistry is expected to play a more important role than previously thought in affecting coastal air quality and atmospheric oxidation *** suggest that models need to consider the hitherto overlooked typhoon-and pollution-mediated increase in reactive bromine levels when assessing the synergic effects of cyclonic activities on the earth system.

关键词： reactive bromine atmospheric chemistry marine boundary layer atmospheric oxidation capacity marine emission

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Rifaximin on epigenetics and autophagy in animal model of hepatocellular carcinoma secondary to metabolic-dysfunction associated steatotic liver disease

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World Journal of Hepatology 2024年第1期16卷 75-90页

作者： matheus Truccolo michalczuk Larisse Longo melina Belén Keingeski Bruno de Souza Basso Gabriel Tayguara Silveira Guerreiro Jessica T Ferrari JoséEduardo Vargas Cláudia P Oliveira Carolina Uribe-Cruz carlos Thadeu Schmidt Cerski Eduardo Filippi-Chiela mário ReisÁlvares-da-Silva Division of Gastroenterology Hospital de Clínicas de Porto AlegrePorto Alegre 90035-903Rio Grande do SulBrazil Graduate Program in Gastroenterology and Hepatology Universidade Federal do Rio Grande do SulPorto Alegre 90035-003Rio Grande do SulBrazil Experimental Laboratory of Hepatology and Gastroenterology Hospital de Clínicas de Porto AlegrePorto Alegre 90035-903Rio Grande do SulBrazil Laboratory of Inflammatory and Neoplastic Cells Universidade Federal do ParanáParaná81530900Brazil Department of Gastroenterology(LIm07) Faculdade de Medicina da Universidade de São PauloSão Paulo 01246903Brazil Facultad de Ciencias de la Salud Universidad Católica de las MisionesPosadasMisiones 3300Argentina Unit of Surgical Pathology Hospital de Clinicas de Porto AlegrePorto Alegre 90035-903Rio Grande do SulBrazil Center of Biotechnology Universidade Federal do Rio Grande do SulPorto Alegre 90035-003Rio Grande do SulBrazil Department of morphological Sciences Universidade Federal do Rio Grande do SulPorto Alegre 90.050-170Rio Grande do SulBrazil Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq) Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq)ResearcherBrasília 71.605-001Brazil

BACKGROUND Prevalence of hepatocellular carcinoma(HCC)is increasing,especially in patients with metabolic dysfunctionassociated steatotic liver disease(mASLD).AIm To investigate rifaximin(RIF)effects on epigenetic/autophagy markers in *** Adult Sprague-Dawley rats were randomly assigned(n=8,each)and treated from 5-16 wk:Control[standard diet,water plus gavage with vehicle(Veh)],HCC[high-fat choline deficient diet(HFCD),diethylnitrosamine(DEN)in drinking water and Veh gavage],and RIF[HFCD,DEN and RIF(50 mg/kg/d)gavage].Gene expression of epigenetic/autophagy markers and circulating miRNAs were *** All HCC and RIF animals developed metabolic-dysfunction associated steatohepatitis fibrosis,and cirrhosis,but three RIF-group did not develop *** animals who developed HCC with those who did not,miR-122,miR-34a,tubulin alpha-1c(Tuba-1c),metalloproteinases-2(mmp2),and metalloproteinases-9(mmp9)were significantly higher in the *** opposite occurred with Becn1,coactivator associated arginine methyltransferase-1(Carm1),enhancer of zeste homolog-2(Ezh2),autophagy-related factor LC3A/B(map1 Lc3b),and p62/sequestosome-1(p62/SQSTm1)-*** with controls,map1 Lc3b,Becn1 and Ezh2 were lower in HCC and RIF-groups(Pm1 was lower in HCC compared to RIF(Pmmp9 was higher in HCC in relation to the control;the opposite was observed for p62/Sqstm1(Pm1 protein was lower in the RIF-group compared to the control(P=0.024).There was no difference among groups for Tuba-1c,Aldolase-B,alpha-fetoprotein,and mmp2(P>0.05).miR-122 was higher in HCC,and miR-34a in RIF compared to controls(PmiR-26b was lower in HCC compared to RIF,and the inverse was observed for miR-224(Pmong groups regarding miR-33a,miR-143,miR-155,miR-375 and miR-21(P>0.05).CONCLUSION RIF might have a possible beneficial effect on preventing/delaying liver carcinogenesis throu

关键词： Animal model Autophagy Epigenetic Hepatocellular carcinoma metabolic dysfunction-associated steatotic liver disease Rifaximin

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Chemical and spectroscopic characterization of humic substances from sediment and riparian soil of a highly polluted urban river(Suquía River,Córdoba,Argentina)

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International Journal of Sediment Research 2020年第3期35卷 287-294页

作者： Carolina merlo Carolina Vázquez Ana Graciela Iriarte carlos matías romero Instituto multidisciplinario de Biologia Vegetal (CONICET) Facultad de Ciencias Agropecuarias Universidad Nacional de Cordoba INFIQC Departament of FisicoquimicaFacultad de Ciencias QuimicasUniversidad Nacional de Cordoba Agriculture and Agri-Food Canada Lethbridge Research and Development Centre Department of Biological Sciences University of Lethbridge

The Suquia River,the largest urban river in Cordoba(Argentina),has been severely polluted for *** must be taken to restore its environmental quality by managing riparian zones for increased water-self *** current study aimed to characterize organic matter(Om) dynamics and humic substances(HS) spectrochemical properties along the lower-middle basin of the Suquia *** soil(0-20 cm) and sediment(0-10 cm) samples were collected from a reference location(S1)and four polluted sites(S2-S5) during a low-flow *** contents of soil and sedimentary Om and HS fractions were analyzed by wet oxidation,as well as HS Fourier transform infrared(FT-IR) and ultraviolet-visible(UV-Vis) spectrochemical *** Om and HS fractions from riparian soil were high upstream of Cordoba City(S1 and S2,50.2-50.4 g/kg Om) and within a 50 km downstream location(S5,30.9 g/kg Om) owing to a surplus of fresh plant biomass-carbon(C) *** heterogeneous sediment samples did not show any significant differences among sites(P> 0.05).The lowest values of the ratio of absorbances at 465 and 665 nm(E4/E6)(1.78) and the Δ log K(0.15) coefficient(a measure of HS maturity degree) were obtained downstream of Cordoba City,for both riparian soil and sediment,indicating that HS were enriched by more condensed aromatic structures within highly degraded portions of the *** samples exhibited similar IR spectra,implying overlapping recalcitrant-C structures at the functional group level,but with different absorbance *** from the current study constitute a baseline for understanding the chemical nature of HS from sediment and riparian soil along the Suquia River and can be used as a reference for future studies tracking Om compositional changes over time.

关键词： Lotic ecosystems Organic matter Humic acids FT-IR spectroscopy UV-Vis spectroscopy

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Severe SARS-CoV-2 Infection: Late Impact on the Retinal Ganglion Cell Layer Thickness

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Open Journal of Ophthalmology 2024年第3期14卷 339-349页

作者： Rayssa de Fátima Farias da Costa Gabino carlos Teixeira Brandt Sebastião Cronemberger UNIFACISA Campina Grande Paraba Brazil Federal University of minas Gerais Belo Horizonte Brazil

Purpose: The involvement of the ocular anterior segment by SARS-CoV-2 has been the subject of many studies, however, the repercussions on the posterior segment, particularly on the different layers of the retina and optic nerve, are still little known. The purpose of this study was to evaluate the impact of severe COVID-19 on the retinal ganglion cell layer (RGCL) thickness. methods: This observational, prospective and analytical study was performed in the Ophthalmology Department of the FACISA University Center, Campina Grande. Three groups were included: group I (control), 29 healthy individuals who had not severe COVID-19;group II (infirmary), 24 individuals who had COVID-19 and were hospitalized in the infirmary;and group III, 25 individuals who had severe COVID-19 and required Intense Care Unit (ICU). All individuals had ophthalmologic examination and assessment of RGCL thickness using Optical Coherence Tomography (OCT). Statistical tests required p ≤ 0.05 to reject the null hypothesis. Results: The mean of RGCL thickness was significantly reduced in individuals from GIII (77.9 ± 8.9 µm), as compared with GII (83.9 ± 10.9 µm) and GI (82.8 ± 6.5 µm) (p = 0.0027). The mean measurements from the retinal neve fiber layer (RNFL) of the optic nerve head were similar. However, when evaluated sectoral, the mean of RNFL at the temporal sector of the optic disc was significantly lower in group GIII (p Conclusion: The RGCL thickness from patients with severe COVID-19 was significantly reduced. This finding supports that the SARS-CoV-2 has systemic action and affinity for nerve cells, including those from the retina and are related to the severity of the infection.

关键词： COVID-19 Post-Acute COVID-19 Syndrome Retinal Ganglion Cell

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Encryption with User Authentication model for Internet of medical Things Environment

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Intelligent Automation & Soft Computing 2023年第1期35卷 507-520页

作者： K.S.Riya R.Surendran carlos Andrés Tavera romero m.Sadish Sendil Department of Information Technology Vel Tech Multi Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Center for Artificial Intelligence and Research(CAIR) Chennai Institute of TechnologyChennai600069India COmBA R&D Laboratory Faculty of EngineeringUniversidad Santiago de CaliCali76001Colombia Department of Emerging Technologies Guru Nanak Institute of TechnologyIbrahipatnam501506TelanganaIndia

Internet of medical Things(IomT)enabled e-healthcare has the potential to greately improve conventional healthcare services ***,security and privacy become major issues of IomT because of the restricted processing abilities,storage,and energy constraints of the ***,it leads to infeasibility of developing traditional cryptographic solutions to the IomT *** order to ensure security on sensitive medical data,effective encryption and authentication techniques need to be designed to assure security of the patients and healthcare service *** this view,this study designs an effective metaheuristic optimization based encryption with user authentication(EmOE-UA)technique for IomT *** work proposes an EmOE-UA technique aims to accomplish mutual authentication for addressing the security issues and reducing the computational ***,the EmOE-UA technique employs optimal multikey homomorphic encryption(OmKHE)technique to encrypt the IomT ***,the improved social spider optimization algorithm(ISSOA)was employed for the optimal multikey generation of the mKHE *** experimental result analysis of the EmOE-UA technique takes place using benchmark data and the results are examined under various *** simulation results reported the considerably better performance of the EmOE-UA technique over the existing techniques.

关键词： User authentication security privacy internet of medical things homomorphic encryption optimal key generation

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Interindividual Age-Independent Differences in Human CX43 Impact Ventricular Arrhythmic Risk

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Research 2024年第3期6卷 417-432页

作者： Laura García-mendívil maría Pérez-Zabalza Antoni Oliver-Gelabert Josémaría Vallejo-Gil Javier Fañanás-mastral manuel Vázquez-Sancho Javier AndréBellido-morales Alexánder Sebastián Vaca-Núñez carlos Ballester-Cuenca Emiliano Diez Laura Ordovás Esther Pueyo Biomedical Signal Interpretation and Computational Simulation group(BSICoS) Aragón Institute of Engineering ResearchUniversity of ZaragozaZaragoza 50018Spain BSICoS Instituto de Investigación Sanitaria Aragón(IISA)Zaragoza 50018Spain Centro Universitario de la Defensa(CUD) Zaragoza 50090Spain. Department of Cardiovascular Surgery University Hospital Miguel ServetZaragoza 50009Spain. Institute of Experimental medicine and Biology of Cuyo(ImBECU) CONICETMendoza 5500Argentina. Fundación Agencia Aragonesa para la Investigación y el Desarrollo(ARAID) Zaragoza 50018Spain. Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine(CIBER-BBN)Zaragoza 50018Spain.

Connexin 43 (CX43) is one of the major components of gap junctions, the structures responsible for the intercellular communication and transmission of the electrical impulse in the left ventricle. There is limited information on the histological changes of CX43 with age and their effect on electrophysiology, especially in humans. Here, we analyzed left ventricular biopsies from living donors starting at midlife to characterize age-related CX43 remodeling. We assessed its quantity, degree of lateralization, and spatial heterogeneity together with fibrotic deposition. We observed no significant age-related remodeling of CX43. Only spatial heterogeneity increased slightly with age, and this increase was better explained by biological age than by chronological age. Importantly, we found that CX43 features varied considerably among individuals in our population with no relevant relationship to age or fibrosis content, in contrast to animal species. We used our experimental results to feed computational models of human ventricular electrophysiology and to assess the effects of interindividual differences in specific features of CX43 and fibrosis on conduction velocity, action potential duration, and arrhythmogenicity. We found that larger amounts of fibrosis were associated with the highest arrhythmic risk, with this risk being increased when fibrosis deposition was combined with a reduction in CX43 amount and/or with an increase in CX43 spatial heterogeneity. These mechanisms underlying high arrhythmic risk in some individuals were not associated with age in our study population. In conclusion, our data rule out CX43 remodeling as an age-related arrhythmic substrate in the population beyond midlife, but highlight its potential as a proarrhythmic factor at the individual level, especially when combined with increased fibrosis.

关键词： CX43 rhythm Independent

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Internet of Things Enabled Energy Aware metaheuristic Clustering for Real Time Disaster management

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Computer Systems Science & Engineering 2023年第5期45卷 1561-1576页

作者： Riya Kumarasamy Santhanaraj Surendran Rajendran carlos Andres Tavera romero Sadish Sendil murugaraj Department of Information Technology Vel Tech Multi Tech Dr.Rangarajan Dr.Sakunthala Engineering CollegeChennai600062India Center for Artificial Intelligence and Research(CAIR) Chennai Institute of TechnologyChennai600069India COmBA R&D Laboratory Faculty of EngineeringUniversidad Santiago de CaliCali76001Colombia Department of Emerging Technologies Guru Nanak Institute of TechnologyIbrahipatnamTelangana501506India

Wireless Sensor Networks(WSNs)are a major element of Internet of Things(IoT)networks which offer seamless sensing and wireless *** management in smart cities can be considered as a safety critical ***,it becomes essential in ensuring network accessibility by improving the lifetime of IoT assisted *** and multihop routing are considered beneficial solutions to accomplish energy efficiency in IoT *** article designs an IoT enabled energy aware metaheuristic clustering with routing protocol for real time disaster management(EAmCR-RTDm).The proposed EAmCR-RTDm technique mainly intends to manage the energy utilization of nodes with the consideration of the features of the disaster *** achieve this,EAmCR-RTDm technique primarily designs a yellow saddle goatfish based clustering(YSGF-C)technique to elect cluster heads(CHs)and organize *** addition,enhanced cockroach swarm optimization(ECSO)based multihop routing(ECSO-mHR)approach was derived for optimal route *** YSGF-C and ECSO-mHR techniques compute fitness functions using different input variables for achieving improved energy efficiency and network *** design of YSGF-C and ECSO-mHR techniques for disaster management in IoT networks shows the novelty of the *** examining the improved outcomes of the EAmCR-RTDm system,a wide range of simulations were performed and the extensive results are assessed in terms of different *** comparative outcomes highlighted the enhanced outcomes of the EAmCRRTDm algorithm over the existing approaches.

关键词： Internet of things disaster management wireless sensor networks real time applications routing clustering

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Colon Adenocarcinoma in a Retrograde Intussusception: A Case Report and Literature Review

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Open Journal of Gastroenterology 2024年第5期14卷 153-160页

作者： carlos Hernández Brito Pedro Arredondo Ruiz Brenda Paola Sáenz Dávila Arsenio Torres Delgado Luis Eduardo méndez Turrubiates Luis Ángel Amezcua Toledo Omar Josué Herrera López Surgical Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Clinical Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico General and Laparoscopic Surgery Corporativo M&#233dico-Quir&#250rgico Torres Veracruz Mexico Radiation Oncology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Radiology Department Centro Oncol&#243gico Onkolid Veracruz Mexico Anatomical Pathology Department Centro Oncol&#243gico Onkolid Veracruz Mexico

Background: Intussusception is defined as a telescoping of a proximal gastrointestinal segment with its mesentery to a distal one, only 5% occur in adults and in colon the probability that it is caused by a malignant disease is up to 65%. Only 1% occurs in a retrograde manner, the rest occur in an anterograde manner. Aim: Describe the clinical presentation of an intussusception in the adult patient as well as its most frequent causes and possible complications that influence decision making for a definitive treatment. Case Presentation: A 66-year-old woman diagnosed with colon adenocarcinoma who underwent elective transverse colectomy and colonic anastomosis with an incidental finding of a transverse colon tumor in a retrograde intussusception was studied. Conclusion: In any adult patient with an intussusception especially in colon a neoplasia should be suspected and the affected segment should be resected without being reduced due to the risk of perforation and tumor dissemination.

关键词： Colon Cancer Colon Adenocarcinoma Colonic Intussusception Intussusception

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