Tumor neuroendocrino en recto simulando una neoplasia benigna: reporte de caso y revisión de a literatura / Neuroendocrine tumor in the rectum simulating a benign neoplasm: case report and literature review

Los tumores neuroendocrinos se definen como un grupo heterogéneo de neoplasias de origen epitelial, provenientes de células enterocromafines diseminadas por todo el organismo, y representan alrededor del 1 al 4 % de todas las neoplasias. Su mayor distribución se encuentra en el tracto gastrointestinal, donde se localiza el 75 % de los tumores neuroendocrinos, siendo los ubicados en el recto, el 27 % de todos los que afectan el tracto gastrointestinal. A propósito de esta revisión de tema, presentamos el caso de un paciente de 71 años de edad, que consultó por sangrado rectal rojo rutilante, sin otra sintomatología asociada, y se le diagnosticó un tumor neuroendocrino grado 1, que se comportaba como una lesión benigna del recto

Neuroendocrine tumors are defined as a heterogeneous group of neoplasms of epithelial origin from enterochromaffin cells disseminated throughout the body, and represent about 1% to 4% of all neoplasms. Its largest distribution is found in the gastrointestinal tract, where 75% of neuroendocrine tumors are located, being 27% of those in the rectum. We present the case of a 71-year-old patient who consulted for bright red blood per rectum, with no other associated symptoms, and was diagnosed with a grade 1 neuroendocrine tumor, which behaved as a benign lesion of the rectum

Adaptación de la técnica de impregnación argéntica de Llombart para la demostración de fibras nerviosas, en cualquier tejido en cortes por parafina / Adaptation of Llombart's silver impregnation technique for demonstration of nerve fibers in any tissue in paraffin sections

En la investigación biológica sigue siendo necesaria la demostración de la inervación periférica en numerosos tejidos y órganos. El objetivo de este trabajo fue rescatar y modernizar uno de los métodos más constantes que hemos probado para demostrar la inervación periférica. La técnica de Llombart para fibras nerviosas se adaptó en cortes por parafina de 7 µm en diferentes tejidos animales. La impregnación argéntica se hizo por goteo en cámara húmeda. Se demostraron en forma constante, precisa y seriada terminaciones nerviosas y corpúsculos sensoriales, neuronas y fibras nerviosas periféricas. A pesar de la alta especificidad para fibras nerviosas, la técnica no compromete el panorama tisular por lo que da bellas imágenes de conjunto. Sin ser una técnica para argentafinidad, demuestra claramente dos tipos de células argentafines en las glándulas adrenales. La adición de los reactivos metálicos en gotas y en cámara húmeda, ofrece una variante sumamente económica.

In Biological research is still necessary for the demonstration of the peripheral innervation in numerous tissues and organs. The aim of this study was to rescue and modernize one of the most consistent methods that we have tried to demonstrate peripheral innervation. Llombart's technique for nerve fibers was adapted by paraffin cuts of 7 µm in different animal tissue. The silver impregnation was done by dripping in a moist chamber. It was demonstrated in a constant, precise and serial form, nerve terminations, and sensorial corpuscles, neurons, and peripheral nerve fibers. Despite being highly specific to nerve fibers, the technique does not sacrifice tissue panorama so it gives beautiful images set. Without being a technique to argentaffin structures, it clearly shows two types of argentaffin cells in the adrenal glands. The addition of the metal reactive in droplets and in a humid chamber provides a very economical variant.

Argentaffine Cells in the Digestive Tract of Hibernating and Non-hibernating in Chinese Fire-bellied Newt (Cynops orientalis) / Celulas Argentafines en el Tracto Digestivo del Tritón de Vientre de Fuego Chino (Cynops orientalis) en Periódos de Hibernación y No Hibernación

In order to further studying the relationship between the gastrointestinal endocrine cells and the hibernation of Chinese fire-bellied newt, histological techniques were used in this study to explore the distributed density and morphology of argentaffine cells in the digestive tract during hibernation and non-hibernation. The argentaffine cells could be observed throughout the digestive tract of Chinese fire-bellied newt during hibernation and non-hibernation and mainly distributed in the acinar epithelial cells, epithelial cells and intrinsic membrane. They had appeared in the shape of goblet, pyramid, ellipse, round, cone-shaped, spindle-shaped. The cytoplasm contains secretory granules at the basal regions with spherical nuclei in the basal regions. Most of them had processes in different directions, suggesting that the argentaffine cells have combined the function of endocrine and exocrine. The distribution density curves of argentaffine cells were generally wavelike during the two periods. It was highest in the body of stomach in hibernation, while in non-hibernation it was highest in the pyloric. Totally the density of argentaffine cells was higher in hibernation period than that in non-hibernation period. The results showed that the activity of the digestive tract was expectedly weakened during the hibernation, but the function of endocrine was actually strengthened.

Con el fin de promover el estudio de la relación entre las células endocrinas gastrointestinales y la hibernación del tritón vientre de fuego chino, fueron utilizados técnicas histológicas para explorar la densidad de distribuición y la morfología de las células argentafines en el tracto digestivo durante la hibernación y la no hibernación. Las células argentafines pudieron ser observadas en todo el tracto digestivo de tritón vientre de fuego chino durante la hibernación y no hibernación, y se distribuyeron principalmente en las células epiteliales acinares, células epiteliales y la membrana intrínseca. Aparecieron de forma caliciforme, piramidal, elíptica, redonda, cónica y de huso. El citoplasma contenía gránulos de secreción en las regiones basales con núcleos esféricos en esa región. La mayoría de ellos tenía procesos en diferentes direcciones, lo que sugiere que las células argentafines combinaron la función del sistema endocrino y exocrino. Las curvas de densidad de distribución de las células argentafines fueron generalmente ondulante durante los dos períodos. Esta fue más alta en el cuerpo del estómago en estado de hibernación, mientras que en la no hibernación fue mayor en el píloro. En total, la densidad de las células argentafines era mayor en el periodo de hibernación. Los resultados mostraron que la actividad del tracto digestivo se debilitó, como era de esperar, durante la hibernación, pero la función del sistema endocrino se fortaleció.

Distribution of serotonin-immunoreactive enterochromaffin cells in the gastrointestinal tract of the least shrew (Cryptotis parva) / Distribución de las células enterocromafines serotonina-inmunorreactiva del tracto gastrointestinal de la musaraña enana (Cryptotis parva)

Serotonin is an important neurotransmitter in the central (CNS) and peripheral (PNS) nervous systems. It is involved in a variety of physiological processes both in the gut and in the CNS. The present study examined the distribution of serotonin containing enterochromaffin cells in the gastrointestinal tract (GIT) of a vomit competent species, the least shrew. These cells were easily recognized by their globular granules stained with the H&E and serotonin immune-positive stain. The immunoreactive enterochromaffin cells (IERCs) were mainly confined to the basal portion of the glandular epithelium and were distributed throughout the shrew stomach, small and large intestine. None was found to be associated with the mucosal epithelial lining. Moreover, their distribution and count varied in different regions of the GIT suggesting specific functions for these regions. The highest concentration of IERCs was found in the colon followed by the Jejunum. Appreciable numbers of IERCs were found in the stomach especially at the esophageo-gastric junction. The gastric location of the IERCs was mainly in the basal portion of the gland. However, some IERCs were associated with the parietal cells of the stomach. Two types of IERCs were observed: One with globular secretory granules in their apical portion of the cytoplasm which were located within the glandular epithelial cells facing the glandular lumen which release their secretions into the lumen; and the second were basally located, facing the lamina propria of the mucosa. Their secretory granules were not distinct in shape, and are most probably paracrine in their mode of secretions...

La serotonina es un importante neurotransmisor del sistema nervioso central (SNC) y periférico (SNP). Está implicado en una variedad de procesos fisiológicos, tanto en el intestino y el SNC. El presente estudio examinó la distribución de la serotonina contenida en las células enterocromafines del tracto gastrointestinal (TGI) de una especie competente al vómito, la musaraña enana. Estas células se reconocen fácilmente por sus gránulos globulares teñidas con H-E y la inmuno-tinción positiva para serotonina. Las células enterocromafines inmunorreactivas (CEI) se limitan principalmente a la parte basal del epitelio glandular y se distribuyeron por todo el estómago, intestino delgado e intestino grueso de la musaraña. Ninguna célula se encontró asociada al revestimiento epitelial mucoso. Además, su distribución y el recuento varió en diferentes regiones del TGI sugiriendo funciones específicas de estas regiones. La mayor concentración de CEI se encuentran en el colon seguido por el yeyuno. Números apreciables de CEI se encontraron en el estómago, especialmente en la unión esofago-gástrica. La ubicación de las CEI gástricas fue principalmente en la porción basal de la glándula. Sin embargo, algunas CEI se asociaron con las células parietales del estómago. Dos tipos de CEI se observaron, una con gránulos secretores globulares en su porción apical del citoplasma que se encuentra dentro de las células epiteliales glandulares que enfrenta el lumen glandular que liberan sus secreciones en el lumen, y el segundo se encuentra basalmente, frente a la lámina propia de la mucosa. Sus gránulos secretores no fueron diferentes en forma, y probablemente son más paracrinas en su modo de secreción...

Serotonin Outside the Central Nervous System / 대한정신약물학회지

Most serotonin is found outside the central nervous system and functions much more than a neurotransmitter. Peripheral serotonin is produced by enterochromaffin cells in the gastrointestinal tract and secreted into blood. Serotonin, as a circulating amine, takes part in numerous biological processes including cardiovascular function, bowel motility, glucose metabolism and skeletal change. Serotonin signaling is regulated by serotonin receptors and serotonin transporters in multiple body organs. The drugs that manipulate the serotonergic system have been developed and used for the treatment of many systemic diseases. The richness of serotonergic modulation in the whole body provide both a pharmacologic opportunity and challenge.

Mechanism of Interdigestive Migrating Motor Complex

Migrating motor complex (MMC) is well characterized by the appearance of gastrointestinal contractions in the interdigestive state. This review article discussed the mechanism of gastrointestinal MMC. Luminal administration of 5-hydroxytryptamine (5-HT) initiates duodenal phase II followed by gastrointestinal phase III with a concomitant increase of plasma motilin release in conscious dogs. Duodenal 5-HT concentration is increased during gastric phase II and phase III. Intravenous infusion of motilin increases luminal 5-HT content and induces gastrointestinal phase III. 5-HT4 antagonists significantly inhibits both of gastric and intestinal phase III, while 5-HT3 antagonists inhibited only gastric phase III. These suggest that gastrointestinal MMC cycle is mediated via the interaction between motilin and 5-HT by the positive feedback mechanism. Gastric MMC is regulated via vagus, 5-HT3/4 receptors and motilin, while intestinal MMC is regulated via intrinsic primary afferent neurons and 5-HT4 receptors. Stress is highly associated with the pathogenesis of functional dyspepsia. Acoustic stress attenuates gastric phase III without affecting intestinal phase III in conscious dogs, via reduced vagal activity and increased sympathetic activity. It has been shown that subset of functional dyspepsia patients show reduced vagal activity and impaired gastric phase III. The physiological importance of gastric MMC is a mechanical and chemical cleansing of the empty stomach in preparation for the next meal. The impaired gastric MMC may aggravate dyspeptic symptoms following a food ingestion. Thus, maintaining gastric MMC in the interdigestive state is an important factor to prevent the postprandial dyspeptic symptoms.

Incremento de linfocitos intraepiteliales en pacientes con sindrome de intestino irritable / Increase of intraepithelial lymphocytes in patients with irritable bowel syndrome

Diversos trabajos reportan aumento en el número de linfocitos intraepiteliales (LIE), mastocitos y células enterocromafines en pacientes con Sindrome de Intestino Irritable (SII). Muchos de estos hallazgos se basan en el uso de inmunohistoquímica que son de poca disponibilidad en hospitales generales. El objetivo del presente trabajo es estudiar los hallazgos histológicos en la biopsia de colon sólo con histoquimica en pacientes con SII comparándolos con un grupo sin SII. Fueron incluidos 25 pacientes: 16 (64%), con criterios diagnósticos de SII y 9 (36%), sin SII. Se encontró un mayor número de LIE en el grupo de SII (p=0,002). Un grupo de pacientes con criterios Roma III (41,9%) presentó LIE en el rango de Colitis Linfocitica por lo que fueron excluidos de este estudio. No se encontró diferencia estadísticamente significativa en el número de mastocitos, células enterocromafines y eosinofilos.

Several studies have shown increased numbers of intraepithelial lymphocytes (IEL), mast cells, enterochromaffin cells in colonic mucosa of patients with Irritable Bowel Syndrome (IBS). Many of these findings are based is based on immunohistochemistry results, which is not available in general hospitals. Our objective is to study the histological findings observed in colon biopsies from patients with IBS compared with a group without IBS, using only histochemistry. Twenty five (25) patients were included: 16 with IBS and 9 without IBS. We found increased numbers of IEL in patients with IBS (p=0,002). A group of patients with IBS(41.9%) who fulfilled histological criteria for lymphocytic colitis were excluded. There was no significant difference in mast cells, enterochromaffin cells or eosinophils.

Síndrome carcinóide com manifestação cardíaca à esquerda / Carcinoid syndrome affecting left heart

Tumores carcinoides são neoplasias neuroendócrinas raras que se originam geralmente nas células enterocromafins do trato gastrintestinal (TGI). Secretam substâncias vasoativas, como a prostaglandina e a 5-HT (serotonina). A síndrome carcinoide ocorre quando há metástase para o fígado, local onde tais substâncias são inativadas. Clinicamente, é caracterizada por flusinhg, diarréia, broncoespasmo e manifestação cardíaca. Descrevemos o caso de uma paciente de 46 anos, com história de carcinoide brônquico, internada com dores abdominais e flushing. Tomografia abdominal mostrou múltiplas metástases hepáticas. Ecocardiografia mostrou ventrículo direito aumentado e movimento anômalo do septo interventricular. Valvas tricúspide e mitral difusamente espessadas e com insuficiência grave em ambas. Manifestação cardíaca na síndrome carcinóide é comum e confere um pior prognóstico à doença. Ecocardiograma é o método de escolha para investigação, pois revela lesões valvares patognomônicas. Acometimento das valvas à esquerda ocorre em apenas 15% dos casos, devido à inativação da serotonina nos pulmões, mas pode ocorrer em casos de tumor brônquico, como neste relato.

Carcinoid tumors are rare neuroendocrine neoplasms that commonly originate from the gastrointestinal tract and produce vasoactive substances like serotonine and prostaglandin. Carcinoid syndrome occurs when there is metastasis to the liver, where those substances are inactivated. Characteristic clinical features are flushing, diarrhea, bronchoconstriction and cardiac abnormalities. We describe a case of a 46-year-old female patient with previous carcinoid tumor in the lung, who was admitted with abdominal cramps and flushing symptoms. Abdominal CT scan detected multiple liver metastasis. Echocardiography showed enlarged right ventricle with paradoxical septal motion, tricuspid and mitral valves diffusely thickened with severe regurgitation on both. Cardiac manifestation in carcinoid syndrome is common and confers a worse prognosis. Echocardiography is the method of choice for assessment, since it detects pathognomonic valvular lesions. Left valves are affected in only 15% of cases, because of serotonine inactivation in the lungs, but it can happen in bronchial tumor, like in this case.

Flushing in a Young Woman: Skin Manifestation of Carcinoid Syndrome / 대한피부과학회지

Carcinoid tumors are derived from enterochromaffin cells that are capable of producing a wide range of neuroendocrine mediators including serotonin or 5-hydroxytryptamine. Carcinoid syndrome occurs when mediators produced by the tumor and normally metabolized by the liver escape into the systemic circulation. The syndrome classically involves the gastrointestinal tract, respiratory system, cardiovascular system and the skin. Flushing is almost universal in the syndrome. A 23-year-old woman came to our hospital presenting with flushing on face and trunk. The patient had experienced flushing for 2 years and it was aggravated by emotional change, stress, exercise, and eating spicy food. The patient also had abdominal pain, diarrhea, weight loss and hepatomegaly. Urinary 5-hydroxyindoleacetic acid was elevated (81.5 mg/day). Abdominal computed tomography scans showed multiple hepatic masses diagnosed as a carcinoid tumor by computed tomography-guided needle biopsy. Physicians should consider carcinoid syndrome when patients present with flushing and systemic symptoms.

Changes of colonic endocrine cells in trinitrobenzene sulfonic acid (TNBS)-induced rat colitis / 대한수의학회지

In this study, immunohistochemistry was used to examine the changes in the density of colonic endocrine cells - argyrophil and argentaffin cells, chromogranin A (CGA), serotonin, somatostatin and glucagon-containing cells in trinitrobenzene sulfonic acid (TNBS)-induced rat colitis. Ulcerative colitis was induced by the instillation of 10 mg of TNBS into the colonic lumen through the anus. To confirm the inducement of ulcerative colitis, the macroscopic and microscopic scores as well as the colonic myeloperoxidase (MPO) activities were monitored for 8 days after TNBS instillation in the colonic lumens. In addition, the number of argyrophil and argentaffin cells, CGA, serotonin, somatostatin and glucagon-immunoreactive cells were counted in the colonic mucosa, respectively. After TNBS instillation into the lumen of the colon from the anus in rats, increases in macroscopic and microscopic scores in the colon tissues were observed along with increases in the colonic MPO activities. Therefore, ulcerative colitis was relatively well induced by the TNBS instillations. Marked decreases in the number of colonic endocrine cells were detected in the TNBS-treated animal compared to the sham control. These results suggest that colonic endocrine cells were also disrupted by TNBS-induced ulcerative colitis.

Increased Immunoendocrine Cells in Intestinal Mucosa of Postinfectious Irritable Bowel Syndrome Patients 3 Years after Acute Shigella Infection: An Observation in a Small Case Control Study

PURPOSE: Postinfectiously irritable bowel syndrome (PI-IBS) develops in 3-30% of individuals with bacterial gastroenteritis. Recent studies demonstrated increases in inflammatory components in gut mucosa of PI-IBS patients even after complete resolution of infection. We aimed to investigate histological changes in colon and rectum of PI-IBS subjects after long term period of infection. MATERIALS AND METHODS: We recruited PI-IBS subjects who had been diagnosed IBS after complete resolution of enteritis caused by shigellosis outbreak 3 years earlier. We compared unmatched four groups, PI-IBS (n = 4), non PI-IBS (n = 7), D-IBS (n = 7, diarrhea predominant type) and healthy controls (n = 10). All of them underwent colonoscopic biopsy at three areas, including descending colon (DC), sigmoid colon (SC) and rectum, which were assessed for 5-hydroxytryptamine (5-HT)/peptide YY (PYY)-containing enterochromaffin (EC) cell, intraepithelial (IEL) and lamina propria T lymphocyte (CD3), CD8 lymphocytes, mast cells and CD68/calprotectin+ macrophages. RESULTS: All subjects had no structural or gross abnormalities at colonoscopy. In PI-IBS, 5-HT containing EC cells, PYY containing EC cells, IELs, CD3 lymphocytes, CD8 lymphocytes, mast cells, and CD68 + macrophages were increased compared to control (p < 0.05). In D-IBS, PYY containing EC cells, IELs, and CD3 lymphocytes were increased compared to control (p < 0.05). In PI-IBS, 5-HT containing EC cells tended to increase and PYY containing EC cells, CD8 lymphocytes, mast cells, and CD68+ macrophages were increased compared to non PI-IBS (p < 0.05). Calprotectin + marcrophages were decreased in PI-IBS, non PI-IBS and IBS compared to control. CONCLUSION: The immunoendocrine cells were sporadically increased in PI-IBS, non PI-IBS and D-IBS compared with control. Our findings in a very small number of patients suggest that mucosal inflammation may play a role in long-term PI-IBS, and that other sub-groups of IBS and larger scale studies are needed to confirm this observation.

Stress-induced Alterations in Mast Cell Numbers and Proteinase-activated Receptor-2 Expression of the Colon: Role of Corticotrophin-releasing Factor

This study was performed in order to assess whether acute stress can increase mast cell and enterochromaffin (EC) cell numbers, and proteinase-activated receptor-2 (PAR2) expression in the rat colon. In addition, we aimed to investigate the involvement of corticotrophin-releasing factor in these stress-related alterations. Eighteen adult rats were divided into 3 experimental groups: 1) a saline-pretreated non-stressed group, 2) a saline-pretreated stressed group, and 3) an astressin-pretreated stressed group. The numbers of mast cells, EC cells, and PAR2-positive cells were counted in 6 high power fields. In proximal colonic segments, mast cell numbers of stressed rats tended to be higher than those of non-stressed rats, and their PAR2-positive cell numbers were significantly higher than those of non-stressed rats. In distal colonic segments, mast cell numbers and PAR2-positive cell numbers of stressed rats were significantly higher than those of non-stressed rats. Mast cell and PAR2-positive cell numbers of astressin-pretreated stressed rats were significantly lower than those of saline-pretreated stressed rats. EC cell numbers did not differ among the three experimental groups. Acute stress in rats increases mast cell numbers and mucosal PAR2 expression in the colon. These stress-related alterations seem to be mediated by release of corticotrophin-releasing factor.

A Case of a Small Rectal Carcinoid Tumor with Multiple Liver Metastasis / 대한소화기내시경학회지

Carcinoid tumors originate from the enterochromaffin cells. Rectal carcinoid tumors comprise 12.6% of all carcinoid tumors and they represent the third largest group of the gut carcinoids. However, a recent report showed that the number of reported cases has increases rapidly, which is probably due to the increased number of colonoscopic examinations. The aggressiveness of rectal carcinoid tumors is determined by the depth of invasion and the presence of metastasis. The clinical course of rectal carcinoid is benign, but these tumors may have a malignant character when the lesion is larger than 2 cm in diameter. We have experienced a case of rectal carcinoid tumor smaller than 2 cm in diameter and the patient had multiple liver metastasis.

A Case of Small Rectal Carcinoid Tumor with Local Lymph Node Metastases / 대한소화기내시경학회지

Carcinoid tumors are rare and they arise from the enterochromaffin cells of the gastrointestinal tract. The rectum is the most common site for gastrointestinal carcinoids, and the majority of rectal carcinoids are found incidentally during colonoscopy. As the use of diagnostic colonoscopy has recently become more common, the number of cases with small rectal carcinoids resected by endoscopic resection has increased. However, distinguishing benign from malignant carcinoids is usually imposible based solely on the histology; therefore, evaluation for the local and distant metastases of rectal carcinoids is necessary even after complete endoscopic resection. We have experienced a case of small rectal carcinoid tumor that was endoscopically completely resected and surgical resection was done for the associated lymph node metastases.

A Case of Multiple Carcinoid Tumors of the Rectum / 대한소화기내시경학회지

Carcinoid tumors are rare and arise from enterochromaffin cells of the gastrointestinal tract. The rectum is the most common site for gastrointestinal carcinoids. The tumor usually present as small solitary submucosal nodules and multicentricity is rare, occurring in only a few percent of cases. The treatment for a rectal carcinoid tumor is based on the size of the lesion and depth of invasion. Although the present treatment guidelines for multiple rectal carcinoids are controversial, each small lesion of less than 1 cm without evidence of a metastasis can be adequately treated by local resection such as an endoscopic mucosal resection. We experienced a case of multiple rectal carcinoids that were completely resected after a hot biopsy and endoscopic mucosal resection.

Role of Moringa oleifera on enterochromaffin cell count and serotonin content of experimental ulcer model.

The present study has been undertaken to observe the effect of aqueous extract of M. oleifera (MO) leaf (300mg/kg body weight) on mean ulcer index, enterochromaffin (EC) cells and serotonin (5-hydroxytryptamine; 5-HT) content of ulcerated gastric tissue. Ulceration was induced by using aspirin (500 mg/kg, po), cerebellar nodular lesion and applying cold stress. In all cases increased mean ulcer index in gastric tissue along with decreased EC cell count was observed with concomitant decrease of 5-HT content. Pretreatment with MO for 14 days decreased mean ulcer index, increased both EC cell count and 5-HT content in all ulcerated group, but treatment with ondansetron, a 5-HT3 receptor antagonist, along with MO pretreatment increased mean ulcer index, decreased 5-HT content without any alteration in EC cell count. The results suggest that the protective effect of MO on ulceration is mediated by increased EC cell count and 5-HT levels which may act via 5-HT3 receptors on gastric tissue.

A Case of Rectal Carcinoid Tumor in a Child / 대한소아소화기영양학회지

Carcinoid tumors are derived from the enterochromaffin cells of neural crest origin. Most are commonly found in the gastrointestinal (GI) tract. The rectum is the third most common site for GI carcinoids. Rectal carcinoid tumors make up 13.7% of all carcinoid tumors and the vast majority occurs in the sixth decade of life. Approximately 80% of rectal carcinoid tumors are less than 1 cm in size, limited to the submucosa without metastasis and can be safely treated by local excision. We report a case of rectal carcinoid tumor in a 13 year-old child that was successfully treated by endoscopic polypectomy.

Tumor carcinoide gástrico: a propósito de un caso / Gastric carcinoids tumor: with regard to a case

Carcinoides gástricos son tumores raros originados de la células enterocromaffin-like de la mucosa no antral. Sin embargo, la prevalencia es mucho mayor en pacientes con hipergastrinemia, como en la anemia perniciosa, aclorhidria, síndrome de Zollinger-Ellison y estados de baja acidez. La mayoría de estos tumores son de crecimiento lento, con bajo porcentaje de metástasis, en especial hígado y ganglios linfáticos. Los carcinoides gástricos han sido clasificados en tres subtipos, con el fin de determinar el pronóstico y la terapia más adecuada. Presentamos un caso de tumor carcinoide gástrico en un masculino de 28 años que fue manejado en el Hospital San Juan de Dios.

A Case of Carcinoid Tumors of the Stomach and Duodenum Treated by Endoscopy / 대한소화기내시경학회지

A carcinoid tumor is a slow growing, rare neoplasm arising from enterochromaffin cells with a malignant potential. A primary carcinoid tumor of the stomach and duodenum is uncommon. However, their prevalence has been increasing due to the widespread use of endoscopy. Recently, the use of endoscopic resection for the treatment of small carcinoid tumors is gradually increasing. To our knowledge, this is the first case report of synchronous carcinoid tumors in the stomach and duodenum. We report a case of small, multiple carcinoid tumors of the stomach and duodenum in a 58-year-old man that was endoscopically removed with a snare.