RESUMO
The 2019 Word Health Organization (WHO) subclassified grade 3 (G3) gastroenteropancreatic (GEP) neuroendocrine neoplasms (NEN) into neuroendocrine carcinoma (NEC) or tumours (G3 NET) based on morphology and proliferation. Yet, few data exist on molecular profiles for G3 NEN. We compared clinicopathological and molecular characteristics of these two groups. We retrospectively reviewed consecutive G3 GEP NEN patients and had their tumour tissues reviewed, reclassified as per the WHO 2019, and analyzed by a next-generation sequencing (NGS) panel. Between 2000 and 2019, 43 patients had pathology revision: 29 (67%) were NEC and 14 (33%) were G3 NET, with a 23% change in diagnosis. Median overal survival for G3 NET and NEC patients was 55.6 and 11.9 months, respectively (hazard ratio = 2.78 [95% confidence interval = 1.09-7.11], p = .042), which was confirmed by an adjusted analysis (hazard ratio = 2.90 NEC vs. G3 NET; p = .03). NGS was performed in 32 cases: 21 NEC and 11 G3 NET. Mutations in RB1 and PTEN were exclusively encountered in NEC. Median tumour mutational burden was 5 (0-67) mutations per megabase in NEC and 4.5 (0-9) among G3 NET. Microsatellite instability was found in 3 (14.3%) NEC cases. In conclusion, pathology revision is essential to estimate prognosis and therapeutic plan. G3 GEP NEN generally harbour low tumor mutation burden and fewer actionable mutations, but 14% of NEC cases were microsatellite unstable and could benefit from immune checkpoint inhibitors.
Assuntos
Neoplasias Gastrointestinais , Tumores Neuroendócrinos , Neoplasias Pancreáticas , Neoplasias Gastrointestinais/tratamento farmacológico , Neoplasias Gastrointestinais/patologia , Humanos , Tumores Neuroendócrinos/diagnóstico , Tumores Neuroendócrinos/tratamento farmacológico , Tumores Neuroendócrinos/genética , Neoplasias Pancreáticas/tratamento farmacológico , Neoplasias Pancreáticas/genética , Neoplasias Pancreáticas/patologia , Prognóstico , Estudos RetrospectivosRESUMO
Over the last decades, some members of the protein tyrosine phosphatase family have emerged as cancer promoters. Among them, the Low Molecular Weight Protein Tyrosine Phosphatase (LMWPTP) has been described to be associated with colorectal cancer liver metastasis and poor prostate cancer prognosis. Of importance in the process of cancer progression and metastasis is the interaction between tumor cells and platelets, as the latter are thought to promote several tumor hallmarks. Here, we examine to what extent LMWPTP expression in tumor cells affects their interaction with platelets. We demonstrate that the gene encoding LMWPTP is overexpressed in upper gastrointestinal (GI) cancer cell as well as colorectal cancer, and subsequently employ cell line models to show that the level of this phosphatase may be further augmented in the presence of platelets. We demonstrate that tumor-platelet interaction promotes GI tumor cell proliferation. Additionally, using know-down/-out models we show that LMWPTP expression in cancer cells contributes to a more efficient interaction with platelets and drives platelet-induced proliferation. These data are the first to demonstrate that phosphatases play a positive role in the tumor-promoting activities of platelets, with LMWPTP emerging as a key player promoting oncogenic phenotypic changes in tumor cells.
Assuntos
Plaquetas/metabolismo , Carcinogênese/genética , Neoplasias Gastrointestinais/genética , Proteínas Tirosina Fosfatases/genética , Proteínas Proto-Oncogênicas/genética , Plaquetas/patologia , Linhagem Celular Tumoral , Proliferação de Células/genética , Técnicas de Cocultura , Feminino , Neoplasias Gastrointestinais/patologia , Regulação Neoplásica da Expressão Gênica/genética , Humanos , Masculino , Peso Molecular , Metástase Neoplásica , Transdução de Sinais/genética , Microambiente Tumoral/genéticaRESUMO
Resumen Introducción Los tumores del estroma gastrointestinal (GIST) corresponden al 1% de todas las neoplasias gastrointestinales, sin embargo, sólo el 3-5% de estos se desarrollan en el duodeno. Objetivo Reportar el caso de un paciente masculino con localización atípica de un tumor de estroma gastrointestinal y su manejo. Caso clínico paciente masculino de 50 años con antecedente de traumatismo encefalo craneano (TEC) con daño orgánico cerebral secundario, tabaquismo, consumidor de alcohol ocasional y sometido a quistectomía branquial en la infancia, que consulta en el servicio de urgencias por cuadro de hemorragia digestiva alta con compromiso hemodinámico. Tras realizar endoscopia digestiva alta (EDA), resonancia nuclear magnética (RNM) y tomografía computada (TC) de abdomen, se pesquisa masa tumoral en segunda porción de duodenal. Discusión A pesar de que la presentación clínica de los GIST es variable, lo más frecuente es que sean pacientes asintomáticos. En algunas ocasiones, al igual que en este reporte, pueden presentarse con dolor abdominal y/o hemorragia digestiva alta. El diagnóstico preoperatorio fue difícil ya que el estudio con imágenes (TC, RNM, EDA) sólo permite establecer la sospecha; el diagnóstico definitivo se realizó con biopsia (no contamos con endosonografía en nuestro centro). Debido a los sitios de reparo anatómico, no existe una cirugía estandarizada; en este caso, debido a la localización, infiltración y características, se decidió realizar una pancreatoduodenectomía.
Introduction Gastrointestinal stromal tumors (GIST), corresponds to 1%, of all gastrointestinal neoplasms, however, only 3%-5% developed in duodenum. Aim To report a case of a male patient with atypical location of gastrointestinal stroma tumor and the treatment proposed. Case report 50-year-old male patient, with medical history of organic brain damage secondary a traumatic brain injury, smoker, occasional alcohol consumer and branquial cystomy during childhood. Consulted in the emergency department for a high digestive hemorrhage case with hemodynamic compromise. Upper digestive endoscopy, computed tomography and nuclear magnetic resonance were performed, which impresses tumor-like lesion in the second duodenal portion. Discussion Although the GIST clinical presentation is variable, most often they are asymptomatic patients. In some times, as in this report, they may present with abdominal pain and/or upper gastrointestinal bleeding. The preoperative diagnosis was difficult, because the imaging study (CT, RNM, EDA) only stablished the suspicion and the final diagnosis was made by biopsy (we don't have endosonography in our center). Due to the anatomic repair, there is not a standardized surgery, in this case, due tumor location, infiltration and characteristics, it was decided to perform a pancreatoduodenectomy.
Assuntos
Humanos , Masculino , Pessoa de Meia-Idade , Tumores do Estroma Gastrointestinal/diagnóstico , Neoplasias Gastrointestinais/patologia , Hemorragia Gastrointestinal/etiologia , Tomografia Computadorizada por Raios X , Tumores do Estroma Gastrointestinal/complicações , Tumores do Estroma Gastrointestinal/patologia , Hemorragia Gastrointestinal/complicaçõesRESUMO
The aim of this study was to evaluate whether body composition, muscle function, and their association are predictive factors for short-term postoperative complications in patients with gastric and colorectal cancer. A prospective cohort study was conducted with patients undergoing resection of gastric and colorectal tumors. Nutritional status was assessed using Patient-Generated Subjective Global Assessment (PG-SGA) and anthropometric techniques. Low handgrip strength (HGS) was observed when <16kg for women, and <27kg for men. Computed tomography images were used to measure visceral adipose tissue, skeletal muscle index (SMI), and skeletal muscle radiodensity (SMD). Complications of grade II or above (according to Clavien-Dindo's classification) were considered in a follow-up period of up to 30 days after surgery. Major complications were defined when they reached grade III or above. A total of 84 patients were analyzed (57.1% female, 59.7 ± 12.6 years) and 19% were diagnosed with low HGS + low SMI or SMD. Postoperative complications occurred in 51.2%, and these patients presented significantly longer duration of surgery and hospital stay. Major complications were observed in 16.7% of the total number of patients. Binary logistic regression adjusted by age, sex, and tumor staging showed that low SMD, low HGS + low SMI or SMD, and obesity were independent risk factors for postoperative complications, but only low SMD was an independent risk factor for major postoperative complications. Low SMD is an independent risk factor for short-term major complications following surgery in patients with gastric and colorectal cancer.
Assuntos
Neoplasias Gastrointestinais/cirurgia , Músculo Esquelético/diagnóstico por imagem , Complicações Pós-Operatórias/epidemiologia , Sarcopenia/epidemiologia , Idoso , Feminino , Neoplasias Gastrointestinais/patologia , Humanos , Tempo de Internação , Masculino , Pessoa de Meia-Idade , Gradação de Tumores , Estado Nutricional , Complicações Pós-Operatórias/diagnóstico por imagem , Estudos Prospectivos , Fatores de Risco , Sarcopenia/diagnóstico por imagem , Sarcopenia/etiologia , Tomografia Computadorizada por Raios XRESUMO
PURPOSE: The mechanisms of brain metastasis are incompletely understood. Circulating tumor cells travel to the right heart and through the pulmonary circulation, where they may become lung metastases, and can circulate further to the left heart and brain. In patients who develop brain metastases without lung involvement, we hypothesized that cancer cells may travel directly from the right atrium to left atrium via a patent foramen ovale (PFO), akin to paradoxical embolism. If the prevalence of PFO is greater in these individuals compared to the general population (20-30%), PFO may play a role in brain metastasis, and prophylactic closure may provide benefit. Accordingly, we investigated the prevalence of PFO in patients with brain metastases without prior lung involvement. METHODS: We prospectively identified patients with brain metastases from a non-lung primary cancer with no preceding or concurrent lung involvement. Nine eligible participants underwent a transcranial Doppler study with intravenous agitated saline to assess for PFO. RESULTS: Among nine participants, primary cancers were breast (n = 6), upper gastrointestinal (n = 2), and thyroid (n = 1). A positive bubble study was identified in 2/9 (22.2%) participants: one female with breast cancer and one male with duodenal adenocarcinoma. No participants developed lung metastases on subsequent chest imaging. CONCLUSION: In this prospective pilot study, we found a similar prevalence of PFO in patients who developed brain metastases without preceding lung involvement compared to estimates for the general population. Through a larger study is needed, the development of brain metastases in these individuals may primarily reflect tumor-specific biological factors diecting metastasis organotropism.
Assuntos
Neoplasias Encefálicas/secundário , Forame Oval Patente/epidemiologia , Adenocarcinoma/secundário , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/patologia , Circulação Cerebrovascular/fisiologia , Neoplasias Duodenais/patologia , Neoplasias Esofágicas/patologia , Feminino , Forame Oval Patente/complicações , Forame Oval Patente/diagnóstico por imagem , Forame Oval Patente/patologia , Neoplasias Gastrointestinais/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Prevalência , Estudos Prospectivos , Circulação Pulmonar/fisiologia , Fluxo Sanguíneo Regional/fisiologia , Solução Salina/administração & dosagem , Câncer Papilífero da Tireoide/secundário , Neoplasias da Glândula Tireoide/patologia , Ultrassonografia Doppler Transcraniana , Manobra de ValsalvaRESUMO
BACKGROUND: Gastrointestinal neuroendocrine tumors are rare, usually presented as subepithelial or polypoid tumors. Accurate diagnosis and indication of the type of resection are still challenging. AIM: To determine the effectiveness of echoendoscopy in determining the depth of the lesions (T) identified by endoscopy in order to evaluate surgical and/or endoscopic indication, and to evaluate the results of endoscopic removal in the medium term. METHODS: Twenty-seven patients were included, all of whom underwent echoendoscopy for TN tumor staging and the evaluation of possible endoscopic resection. The parameters were: lesion size, origin layer, depth of involvement and identified perilesional adenopathies. The inclusion criteria for endoscopic resection were: 1) high surgical risk; 2) those with NET <2 cm; 3) absence of impairment of the muscle itself; and 4) absence of perilesional adenopathies in echoendoscopy and in others without distant metastases. Exclusion criteria were TNE> 2 cm; those with infiltration of the muscle itself; with perilesional adenopathies and distant metastases. The techniques used were: resection with polypectomy loop; mucosectomy with saline injection; and mucosectomy after ligation with an elastic band. The anatomopathological study of the specimens included evaluation of the margins and immunohistochemistry (chromogranin, synaptophysin and Ki 67) to characterize the tumor. Follow-up was done at 1, 6 and 12 months. RESULTS: Resections with polypectomy loop were performed in 15 patients; mucosectomy in five; mucosectomy and ligation with elastic band in three and the remaining four were referred for surgery. The anatomopathological specimens and immunohistochemical analyzes showed positive chromogranin and synaptophysin, while Ki 67 was less than 5% among all cases. The medium-term follow-up revealed three recurrences. The average size of tumors in the stomach was 7.6 mm and in the duodenum 7.2 mm. Well-demarcated, hypoechoic, homogeneous lesions occurred in 75%; mucous layer in 80%; and the deep and submucosal mucosa in 70%. CONCLUSIONS: Echoendoscopy proved to be a good method for the study of subepithelial lesions, being able to identify the layer affected by the neoplasm, degree of invasion, echogenicity, heterogeneity, size of the lesion and perilesional lymph node involvement and better indicate the treatment option.
Assuntos
Endossonografia/métodos , Neoplasias Gastrointestinais/diagnóstico por imagem , Neoplasias Gastrointestinais/cirurgia , Tumores Neuroendócrinos/diagnóstico por imagem , Tumores Neuroendócrinos/cirurgia , Neoplasias Gastrointestinais/patologia , Humanos , Recidiva Local de Neoplasia , Estadiamento de Neoplasias , Tumores Neuroendócrinos/patologia , Resultado do TratamentoRESUMO
Gastrointestinal neoplasms (GIN) are uncommon in dogs, but they mainly show malignant behavior and poor prognosis. The types of GIN in dogs and their frequency, as well as their epidemiological and histopathological characteristics were analyzed through a retrospective study of biopsies from 24.711 dogs from 2005 to 2017. Additionally, histological sections of neoplasms were subjected to immunohistochemistry (IHC) using antibodies against pancytokeratin, vimentin, smooth muscle actin, c-Kit, S-100, CD31, CD79αcy, and neuron-specific enolase. Of the total samples from dogs analyzed, 88 corresponded to GIN. Neoplasms occurred more frequently in purebred dogs (64.8%, 57/88), males (53.4%, 47/88), with a median age of 10 years. The intestine was affected by 84.1% (74/88) of the cases. Of these, the large intestine was the most affected (67.6%, 50/74). Most of the neoplasms had malignant behavior (88.6%, 78/88). Regarding the classification of neoplasms, 46.6% (41/88) of the diagnoses corresponded to epithelial, 46.6% (41/88) were mesenchymal, 5.7% (5/88) were hematopoietic, and 1.1% (1/88) was neuroendocrine. The most frequently diagnosed neoplasms were papillary adenocarcinoma (19.3%, 17/88), leiomyosarcoma (17.0%, 15/88), gastrointestinal stromal tumors (GISTs) (12.5%, 11/88), and leiomyoma (5.0%, 8/88). Adenocarcinomas were located mainly in the rectum, whereas leiomyosarcomas and GISTs developed mainly in the cecum. Epithelial neoplasms showed a greater potential for lymphatic invasion whereas mesenchymal neoplasms appeared to be more expansive with intratumoral necrosis and hemorrhage. Immunohistochemistry was found to be an important diagnostic technique for the identification of infiltrating cells in carcinomas and an indispensable technique for the definitive diagnosis of sarcomas.(AU)
Neoplasmas gastrointestinais (NGI) são pouco comuns em cães, mas possuem principalmente comportamento maligno e prognóstico reservado. Os tipos de NGI em cães e sua frequência, bem como características epidemiológicas e histopatológicas foram analisados por meio de um estudo retrospectivo dos exames de biópsias de 24.711 cães entre os anos de 2005 a 2017. Adicionalmente, cortes histológicos de NGI foram submetidos à técnica de imuno-histoquímica (IHQ), utilizando os anticorpos anti-pancitoqueratina, vimentina, actina de músculo liso, c-Kit, S-100, CD31, CD79αcy e enolase neurônio específica. Do total de cães analisados, 88 corresponderam a NGI não linfoides. Os neoplasmas ocorreram com maior frequência em cães de raça pura (64,8%, 57/88), machos (53,4%, 47/88), com mediana de idade de 10 anos. O intestino foi acometido em 84,1% dos casos (74/88). Destes, o intestino grosso foi o segmento mais afetado (67,6%, 50/74). A maior parte dos neoplasmas tinha comportamento maligno (88,6%, 78/88). Quanto à classificação, 46,6% (41/88) dos diagnósticos corresponderam a neoplasmas epiteliais, 46,6% (41/88) mesenquimais, 5,7% (5/88) hematopoiéticos e 1,1% (1/88), neuroendócrino. Os neoplasmas mais frequentemente diagnosticados foram adenocarcinoma papilar (19,3%, 17/88), leiomiossarcoma (17,0%, 15/88), tumor estromal gastrointestinal (GIST) (12,5%, 11/88) e leiomioma (12,5%, 8/88). Adenocarcinomas localizavam-se principalmente no reto, enquanto leiomiossarcoma e GISTs desenvolveram-se principalmente no ceco. Os neoplasmas epiteliais demonstraram um potencial maior de invasão linfática enquanto que os mesenquimais aparentaram ser mais expansivos, com necrose e hemorragia intratumorais. A imuno-histoquímica mostrou ser uma técnica diagnóstica importante para a identificação de células neoplásicas infiltravas no caso dos carcinomas e uma técnica indispensável para o diagnóstico definitivo de sarcomas.(AU)
Assuntos
Animais , Cães , Neoplasias Gástricas/veterinária , Neoplasias Gastrointestinais/patologia , Neoplasias Gastrointestinais/veterinária , Neoplasias Gastrointestinais/epidemiologia , Neoplasias Intestinais/veterinária , Imuno-Histoquímica/veterinária , Adenocarcinoma Papilar/veterinária , Carcinoma de Células Acinares/veterinária , Adenocarcinoma Mucinoso/veterinária , Neoplasias Gastrointestinais/diagnóstico , Leiomiossarcoma/veterináriaRESUMO
Gastrointestinal neoplasms (GIN) are uncommon in dogs, but they mainly show malignant behavior and poor prognosis. The types of GIN in dogs and their frequency, as well as their epidemiological and histopathological characteristics were analyzed through a retrospective study of biopsies from 24.711 dogs from 2005 to 2017. Additionally, histological sections of neoplasms were subjected to immunohistochemistry (IHC) using antibodies against pancytokeratin, vimentin, smooth muscle actin, c-Kit, S-100, CD31, CD79αcy, and neuron-specific enolase. Of the total samples from dogs analyzed, 88 corresponded to GIN. Neoplasms occurred more frequently in purebred dogs (64.8%, 57/88), males (53.4%, 47/88), with a median age of 10 years. The intestine was affected by 84.1% (74/88) of the cases. Of these, the large intestine was the most affected (67.6%, 50/74). Most of the neoplasms had malignant behavior (88.6%, 78/88). Regarding the classification of neoplasms, 46.6% (41/88) of the diagnoses corresponded to epithelial, 46.6% (41/88) were mesenchymal, 5.7% (5/88) were hematopoietic, and 1.1% (1/88) was neuroendocrine. The most frequently diagnosed neoplasms were papillary adenocarcinoma (19.3%, 17/88), leiomyosarcoma (17.0%, 15/88), gastrointestinal stromal tumors (GISTs) (12.5%, 11/88), and leiomyoma (5.0%, 8/88). Adenocarcinomas were located mainly in the rectum, whereas leiomyosarcomas and GISTs developed mainly in the cecum. Epithelial neoplasms showed a greater potential for lymphatic invasion whereas mesenchymal neoplasms appeared to be more expansive with intratumoral necrosis and hemorrhage. Immunohistochemistry was found to be an important diagnostic technique for the identification of infiltrating cells in carcinomas and an indispensable technique for the definitive diagnosis of sarcomas.(AU)
Neoplasmas gastrointestinais (NGI) são pouco comuns em cães, mas possuem principalmente comportamento maligno e prognóstico reservado. Os tipos de NGI em cães e sua frequência, bem como características epidemiológicas e histopatológicas foram analisados por meio de um estudo retrospectivo dos exames de biópsias de 24.711 cães entre os anos de 2005 a 2017. Adicionalmente, cortes histológicos de NGI foram submetidos à técnica de imuno-histoquímica (IHQ), utilizando os anticorpos anti-pancitoqueratina, vimentina, actina de músculo liso, c-Kit, S-100, CD31, CD79αcy e enolase neurônio específica. Do total de cães analisados, 88 corresponderam a NGI não linfoides. Os neoplasmas ocorreram com maior frequência em cães de raça pura (64,8%, 57/88), machos (53,4%, 47/88), com mediana de idade de 10 anos. O intestino foi acometido em 84,1% dos casos (74/88). Destes, o intestino grosso foi o segmento mais afetado (67,6%, 50/74). A maior parte dos neoplasmas tinha comportamento maligno (88,6%, 78/88). Quanto à classificação, 46,6% (41/88) dos diagnósticos corresponderam a neoplasmas epiteliais, 46,6% (41/88) mesenquimais, 5,7% (5/88) hematopoiéticos e 1,1% (1/88), neuroendócrino. Os neoplasmas mais frequentemente diagnosticados foram adenocarcinoma papilar (19,3%, 17/88), leiomiossarcoma (17,0%, 15/88), tumor estromal gastrointestinal (GIST) (12,5%, 11/88) e leiomioma (12,5%, 8/88). Adenocarcinomas localizavam-se principalmente no reto, enquanto leiomiossarcoma e GISTs desenvolveram-se principalmente no ceco. Os neoplasmas epiteliais demonstraram um potencial maior de invasão linfática enquanto que os mesenquimais aparentaram ser mais expansivos, com necrose e hemorragia intratumorais. A imuno-histoquímica mostrou ser uma técnica diagnóstica importante para a identificação de células neoplásicas infiltravas no caso dos carcinomas e uma técnica indispensável para o diagnóstico definitivo de sarcomas.(AU)
Assuntos
Animais , Cães , Neoplasias Gástricas/veterinária , Neoplasias Gastrointestinais/patologia , Neoplasias Gastrointestinais/veterinária , Neoplasias Gastrointestinais/epidemiologia , Neoplasias Intestinais/veterinária , Imuno-Histoquímica/veterinária , Adenocarcinoma Papilar/veterinária , Carcinoma de Células Acinares/veterinária , Adenocarcinoma Mucinoso/veterinária , Neoplasias Gastrointestinais/diagnóstico , Leiomiossarcoma/veterináriaRESUMO
ABSTRACT Background: Gastrointestinal neuroendocrine tumors are rare, usually presented as subepithelial or polypoid tumors. Accurate diagnosis and indication of the type of resection are still challenging. Aim: To determine the effectiveness of echoendoscopy in determining the depth of the lesions (T) identified by endoscopy in order to evaluate surgical and/or endoscopic indication, and to evaluate the results of endoscopic removal in the medium term. Methods: Twenty-seven patients were included, all of whom underwent echoendoscopy for TN tumor staging and the evaluation of possible endoscopic resection. The parameters were: lesion size, origin layer, depth of involvement and identified perilesional adenopathies. The inclusion criteria for endoscopic resection were: 1) high surgical risk; 2) those with NET <2 cm; 3) absence of impairment of the muscle itself; and 4) absence of perilesional adenopathies in echoendoscopy and in others without distant metastases. Exclusion criteria were TNE> 2 cm; those with infiltration of the muscle itself; with perilesional adenopathies and distant metastases. The techniques used were: resection with polypectomy loop; mucosectomy with saline injection; and mucosectomy after ligation with an elastic band. The anatomopathological study of the specimens included evaluation of the margins and immunohistochemistry (chromogranin, synaptophysin and Ki 67) to characterize the tumor. Follow-up was done at 1, 6 and 12 months. Results: Resections with polypectomy loop were performed in 15 patients; mucosectomy in five; mucosectomy and ligation with elastic band in three and the remaining four were referred for surgery. The anatomopathological specimens and immunohistochemical analyzes showed positive chromogranin and synaptophysin, while Ki 67 was less than 5% among all cases. The medium-term follow-up revealed three recurrences. The average size of tumors in the stomach was 7.6 mm and in the duodenum 7.2 mm. Well-demarcated, hypoechoic, homogeneous lesions occurred in 75%; mucous layer in 80%; and the deep and submucosal mucosa in 70%. Conclusions: Echoendoscopy proved to be a good method for the study of subepithelial lesions, being able to identify the layer affected by the neoplasm, degree of invasion, echogenicity, heterogeneity, size of the lesion and perilesional lymph node involvement and better indicate the treatment option.
RESUMO Racional: Tumores neuroendócrinos gastrointestinais são raros geralmente apresentados como tumores subepiteliais ou polipoides. O diagnóstico preciso e a indicação do tipo de ressecção ainda são desafiadores. Objetivo: Determinar a eficácia da ecoendoscopia em determinar a profundidade das lesões (T) identificadas pela endoscopia com objetivo de avaliar indicação cirúrgica e/ou endoscópica, e avaliar os resultados da remoção endoscópica em seguimento em médio prazo. Métodos: Foram incluídos 27 pacientes todos submetidos à ecoendoscopia para estadiamento tumoral TN e à avaliação de possível ressecção endoscópica. Os parâmetros estudados foram: tamanho da lesão, camada de origem, profundidade do acometimento e adenopatias perilesionais identificadas. Os critérios de inclusão para ressecção endoscópica foram: 1) risco cirúrgico elevado; 2) aqueles com TNE <2 cm; 3) ausência de comprometimento da muscular própria; e 4) ausência de adenopatias perilesionais na ecoendoscopia e em outros sem metástases à distância. Os critérios de exclusão foram TNE >2 cm; os com infiltração da muscular própria; com adenopatias perilesionais e metástases à distância. As técnicas utilizadas foram: ressecção com alça de polipectomia; mucosectomia com injeção de solução salina; e mucosectomia após a ligadura com banda elástica. O estudo anatomopatológico dos espécimes incluiu avaliação das margens e imunoistoquímica (cromogranina, sinaptofisina e Ki 67) para caracterizar o tumor. O seguimento foi feito com 1, 6 e 12 meses. Resultados: Ressecções com alça de polipectomia foram realizadas em 15 pacientes; mucosectomia em cinco; mucosectomia e ligadura com banda elástica em três e os quatro restantes foram encaminhados para cirurgia. O anatomopatológico dos espécimes e as análises imunoistoquímicas mostraram cromogranina e sinaptofisina positivas, enquanto que o Ki 67 foi menor que 5% dentre todos os casos. O seguimento em médio prazo revelou três recidivas. A média de tamanho dos tumores no estômago foi de 7,6 mm e no duodeno 7,2 mm. As lesões bem demarcadas, hipoecóicas, homogêneas ocorreram em 75%; da camada mucosa em 80%; e da mucosa profunda e submucosa em 70%. Conclusões: A ecoendoscopia mostrou ser bom método para o estudo de lesões subepiteliais podendo identificar a camada acometida pela neoplasia, grau de invasão, ecogeneicidade, heterogeneidade, tamanho da lesão e acometimento linfonodal perilesional e melhor indicar a opção de tratamento.
Assuntos
Humanos , Tumores Neuroendócrinos/cirurgia , Tumores Neuroendócrinos/diagnóstico por imagem , Endossonografia/métodos , Neoplasias Gastrointestinais/cirurgia , Neoplasias Gastrointestinais/diagnóstico por imagem , Resultado do Tratamento , Tumores Neuroendócrinos/patologia , Neoplasias Gastrointestinais/patologia , Recidiva Local de Neoplasia , Estadiamento de NeoplasiasRESUMO
GI tumors represent a heterogeneous group of neoplasms concerning their natural history and molecular alterations harbored. Nevertheless, these tumors share very high incidence and mortality rates worldwide and patients' poor prognosis. Therefore, the identification of specific biomarkers could increase the development of personalized medicine, in order to improve GI cancer management. In this sense, HMGA family members (HMGA1 and HMGA2) comprise an important group of genes involved in the genesis and progression of malignant tumors. Additionally, it has also been reported that HMGA1 and HMGA2 display an important role in the detection and progression of GI tumors. In this way, HMGA family members could be used as reliable biomarkers able to efficiently track not only the tumor per se but also the main risk conditions related with their development of GI cancers in the future. Finally, it shall be a promising option to revert the current scenario, once HMGA genes and proteins could represent a convergence point in the complex landscape of GI tumors.