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ResumenLos síndromes paraneoplásicos representan manifestaciones clínicas que producen los tumores en sitios distantes a ellos y que no están relacionadas físicamente con ellos ni con sus metástasis. Diferentes tumores gastrointestinales pueden presentar síndromes o manifestaciones sistémicas, dermatológicas, hematológi-cas, renales y neurológicas, entre otras. Aquí se ofrece una revisión de esas distintas manifestaciones. Palabras claveSíndrome paraneoplásico, gastrointestinal, tumores. AbstractParaneoplastic syndromes produce tumors at sites distant from themselves and are not physically related to those tumors or to their metastases. Various gastrointestinal tumors may present syndromes or systemic, dermatological, hematological, renal, neurological and other manifestations. This study reviews these manifestations. KeywordsParaneoplastic syndrome, gastrointestinal, tumors.Revisión de tema DOI: https://doi.org/10.22516/25007440.155 INTRODUCCIÓNLos síndromes paraneoplásicos (SPN) son un grupo heterogéneo de manifestaciones clínicas que se producen cuando un tumor provoca un daño en un órgano o sistema distante y que no están relacionadas físicamente con el tumor o sus metástasis (1). Esas alteraciones son independientes del efecto local del tumor, la invasión a otros órga-nos, los déficits nutricionales y las consecuencias derivadas del tratamiento antineoplásico (1, 2). La gran variedad de manifestaciones clínicas es secundaria a la liberación de sustancias por parte de las células neoplásicas malignas (2) que liberan hormonas, péptidos similares a hormonas, factores de crecimiento y citoquinas (1, 2, 3). Adicionalmente, también participan respuestas inmunitarias que, inicialmente, estaban dirigidas contra las nuevas sustancias o antígenos tumorales (oncoantígenos) y que, por reacción cruzada, terminan lesionando tejidos normales (3, 4) y, finalmente, acumulando complejos inmunes (5). Los diferentes SPN se dividen según el órgano o sistema al que afecten y, clásicamente, se clasifican en endocrinometabólicos, dermatológicos, hematológicos, reumatológicos y neurológicos (3). En la presente revisión, se describen los SPN producidos por tumores gastrointestinales (GI).
ResumenLos síndromes paraneoplásicos representan manifestaciones clínicas que producen los tumores en sitios distantes a ellos y que no están relacionadas físicamente con ellos ni con sus metástasis. Diferentes tumores gastrointestinales pueden presentar síndromes o manifestaciones sistémicas, dermatológicas, hematológi-cas, renales y neurológicas, entre otras. Aquí se ofrece una revisión de esas distintas manifestaciones. Palabras claveSíndrome paraneoplásico, gastrointestinal, tumores. AbstractParaneoplastic syndromes produce tumors at sites distant from themselves and are not physically related to those tumors or to their metastases. Various gastrointestinal tumors may present syndromes or systemic, dermatological, hematological, renal, neurological and other manifestations. This study reviews these manifestations. KeywordsParaneoplastic syndrome, gastrointestinal, tumors.Revisión de tema DOI: https://doi.org/10.22516/25007440.155 INTRODUCCIÓNLos síndromes paraneoplásicos (SPN) son un grupo heterogéneo de manifestaciones clínicas que se producen cuando un tumor provoca un daño en un órgano o sistema distante y que no están relacionadas físicamente con el tumor o sus metástasis (1). Esas alteraciones son independientes del efecto local del tumor, la invasión a otros órga-nos, los déficits nutricionales y las consecuencias derivadas del tratamiento antineoplásico (1, 2). La gran variedad de manifestaciones clínicas es secundaria a la liberación de sustancias por parte de las células neoplásicas malignas (2) que liberan hormonas, péptidos similares a hormonas, factores de crecimiento y citoquinas (1, 2, 3). Adicionalmente, también participan respuestas inmunitarias que, inicialmente, estaban dirigidas contra las nuevas sustancias o antígenos tumorales (oncoantígenos) y que, por reacción cruzada, terminan lesionando tejidos normales (3, 4) y, finalmente, acumulando complejos inmunes (5). Los diferentes SPN se dividen según el órgano o sistema al que afecten y, clásicamente, se clasifican en endocrinometabólicos, dermatológicos, hematológicos, reumatológicos y neurológicos (3). En la presente revisión, se describen los SPN producidos por tumores gastrointestinales (GI).
IMPORTANCE Patients with psoriasis may experience comorbidities involving cardiovascular diseases, chronic kidney disease, uveitis, psychiatric disturbances, and metabolic syndrome. However, the association between psoriasis and inflammatory bowel disease (IBD) has been largely unclear. OBJECTIVE To investigate the association of psoriasis with IBD. DATA SOURCES For this systematic review and meta-analysis, MEDLINE, Embase, and the Cochrane Central Register of Controlled Trials were searched for relevant studies from inception to January 17, 2018. STUDY SELECTION Case-control, cross-sectional, or cohort studies that examined either the odds or risk of IBD in patients with psoriasis were included. No geographic or language limitations were used in the search. DATA EXTRACTION AND SYNTHESIS The PRISMA and MOOSE guidelines were followed for data extraction. The Newcastle-Ottawa Scale was used to evaluate the risk of bias of included studies. Crohn disease and ulcerative colitis were analyzed separately and random-effects model meta-analysis was conducted. A subgroup analysis was performed on psoriatic arthritis. MAIN OUTCOMES AND MEASURES The risk and odds of IBD, Crohn disease, and ulcerative colitis in patients with psoriasis. RESULTS A total of 5 case-control or cross-sectional studies and 4 cohort studies with 7 794 087 study participants were included. Significant associations were found between psoriasis and Crohn disease (odds ratio, 1.70; 95% CI, 1.20-2.40) and between psoriasis and ulcerative colitis (odds ratio, 1.75; 95% CI, 1.49-2.05). Patients with psoriasis had an increased risk of Crohn disease (risk ratio, 2.53; 95% CI, 1.65-3.89) and ulcerative colitis (risk ratio, 1.71; 95% CI, 1.55-1.89). CONCLUSIONS AND RELEVANCE These findings suggest that psoriasis is significantly associated with IBD. Gastroenterology consultation may be indicated when patients with psoriasis present with bowel symptoms.
ImportancePsoriasis, psoriatic arthritis, and inflammatory bowel disease, ie, Crohn disease and ulcerative colitis, are chronic systemic immune-mediated disorders affecting an increasing proportion of adults and children worldwide. Observational studies have suggested an association between inflammatory bowel disease and psoriasis and vice versa. So far, however, it remains unclear whether and in which direction causal relationships exist.ObjectiveTo investigate the association between inflammatory bowel disease, particularly Crohn disease and ulcerative colitis, and psoriasis or psoriatic arthritis.Design, Setting, and ParticipantsA bidirectional 2-sample mendelian randomization study was conducted using summary statistics from genome-wide association studies including up to 463 372 European individuals. Total and direct effects were derived performing an iterative radial and robust inverse-variance weighted method within the univariable and multivariable mendelian randomization setting, respectively. Causal estimates were verified using a validation inflammatory bowel disease sample, a series of pleiotropy-robust mendelian randomization methods, and sensitivity analyses based on a PhenoScanner search in conjunction with network analysis. Data analysis was performed from April to May 2022.Main Outcomes and MeasuresInflammatory bowel disease, Crohn disease, ulcerative colitis, psoriasis, and psoriatic arthritis were used as both exposures and outcomes.ResultsThe European samples included 12 882 cases of inflammatory bowel disease and 5621 cases of psoriasis. The proportion of women ranged between 48% and 56%. Genetically predicted inflammatory bowel disease was associated with higher risk of psoriasis (pooled odds ratio [OR], 1.10; 95% CI, 1.05-1.15; P < .001) and psoriatic arthritis (pooled OR, 1.10; 95% CI, 1.04-1.18; P = .003). In contrast with ulcerative colitis, the Crohn disease subentity was associated with psoriasis (OR, 1.16; 95% CI, 1.12-1.20; P < .001) and psoriatic arthritis (OR, 1.13; 95% CI, 1.06-1.20; P < .001). Regarding the reverse directions, no notable associations could be found.Conclusions and RelevanceFindings of this mendelian randomization study support a causal effect between inflammatory bowel disease and psoriasis as well as psoriatic arthritis, but not vice versa. It seems that especially Crohn disease and not ulcerative colitis is responsible for the causal effect of inflammatory bowel disease on both psoriasis outcomes. These findings have implications for the management of inflammatory bowel disease and psoriasis in clinical practice.
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