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      Tumor carcinoide de la apéndice cecal: Reporte de cuatro casos en la Clínica Carlos Ardila Lülle, Floridablanca, Colombia Translated title: Carcinoid tumor of the cecal appendix: A report of four cases in the Clinica Carlos Ardila Lulle, Floridablanca, Colombia

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          Abstract

          Introducción: Los tumores carcinoides son las neoplasias más frecuentes del apéndice cecal, se caracterizan por un crecimiento lento y curso clínico asintomático, su incidencia se calcula en 1-2 casos por cada 100,000 habitantes, se encuentran en menos del 1% de las apendicetomías y se presentan con mayor frecuencia en mujeres entre la cuarta a quinta época de la vida. Por lo general se trata de lesiones pequeñas que se diagnostican luego de la apendicetomía. Metodología El presente trabajo corresponde a una descripción de casos de tumor carcinoide del apéndice cecal, realizado en el laboratorio de patología MEGA, de la Clínica Ardila Lulle (CAL) que incluye revisión de protocolos de especímenes quirúrgicos analizados entre enero 1 de 2000 y diciembre 31 de 2010. Resultados: Durante el periodo propuesto se encuentran cuatro casos de tumor carcinoide confinado al apéndice cecal en cuatro mujeres jóvenes. Tres de las lesiones presentan patrón histológico tipo A o insular y el restante un patrón tipo B o trabecular, en todos los casos se documentó reactividad con las sales de plata con la coloración de Fontana Masson y en los cuatro se encontró positividad con el marcador neuroendocrino cromogranina. Conclusión: Los tumores carcinoides de apéndice son lesiones de origen neuroendocrino, la mayoría circunscritas a la punta del órgano y de curso clínico indolente, sin embargo algunos de estos tumores tienen un comportamiento agresivo, que depende de su tamaño y de la actividad mitótica de sus células, por lo que se recomienda incluir en la evaluación diagnostica la cromogranina y el Ki67, marcadores neuroendocrino y de proliferación celular. Salud UIS 2011; 43 (2): 203-210

          Translated abstract

          Introduction: The carcinoids tumours are the most common neoplasm of the cecal appendix, are characterized by a slow growth and asymptomatic clinical course, its incidence is estimated at 1-2 cases per 100.000 inhabitants, are less than 1% of appendicectomies and occur most often in women between the fourth o fifth decade of life. Usually these are small lesions diagnosed after appendicectomy. Methodology: This work belongs to a description of cases of carcinoid tumor of cecal appendix, conduced in the MEGA anatomic pathology laboratory of Carlos Ardila Lulle Clinic (CAL), wich includes protocols review of surgical specimens analized between January 1, 2000 and December 31, 2010. Results: During the proposed period are four cases of carcinoid tumor confined to the cecal appendix in four young women. Three of the lesions have the A histological type or insular pattern, and the remainder have the B histological type or trabecular pattern, in all cases documented reactivity with silver salts with Masson-Fontana stain and all four were found positive with the neuroendocrine marker chromogragin. Conclusion: The carcinoid tumors of the apenddix are lesions of neuroendocrine origen, most of them located at the tip of the organ, and having a indolent clinical course; however some of these tumors have an aggressive behavior, which depends on its size and the mitotic activity of its cells, that's the reason why the diagnostic evaluation of neuroendocrine markers like chromogranin, and Ki67 (proliferation cell index) are recommended. Salud UIS 2011; 43 (2): 203-210

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          Most cited references58

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          One hundred years after "carcinoid": epidemiology of and prognostic factors for neuroendocrine tumors in 35,825 cases in the United States.

          PURPOSE Neuroendocrine tumors (NETs) are considered rare tumors and can produce a variety of hormones. In this study, we examined the epidemiology of and prognostic factors for NETs, because a thorough examination of neither had previously been performed. METHODS The Surveillance, Epidemiology, and End Results (SEER) Program registries were searched to identify NET cases from 1973 to 2004. Associated population data were used for incidence and prevalence analyses. Results We identified 35,618 patients with NETs. We observed a significant increase in the reported annual age-adjusted incidence of NETs from 1973 (1.09/100,000) to 2004 (5.25/100,000). Using the SEER 9 registry data, we estimated the 29-year limited-duration prevalence of NETs on January 1, 2004, to be 9,263. Also, the estimated 29-year limited-duration prevalence in the United States on that date was 103,312 cases (35/100,000). The most common primary tumor site varied by race, with the lung being the most common in white patients, and the rectum being the most common in Asian/Pacific Islander, American Indian/Alaskan Native, and African American patients. Additionally, survival duration varied by histologic grade. In multivariate analysis of patients with well-differentiated to moderately differentiated NETs, disease stage, primary tumor site, histologic grade, sex, race, age, and year of diagnosis were predictors of outcome (P < .001). CONCLUSION We observed increased reported incidence of NETs and increased survival durations over time, suggesting that NETs are more prevalent than previously reported. Clinicians need to be become familiar with the natural history and patterns of disease progression, which are characteristic of these tumors.
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            Updated population-based review of carcinoid tumors.

            To determine the population-based incidence, anatomic distribution, and survival rates of gastrointestinal carcinoid tumors. Carcinoid tumors arise from neuroendocrine cells and may develop in almost any organ. Many textbooks and articles represent single institution studies and report varying incidence rates, anatomic distribution of tumors, and patient survival rates. Population-based statistics remain largely unknown. Data was obtained from the National Cancer Institute Surveillance, Epidemiology, and End Results program (1973 to 1997). Incidence rates, distribution, and 5-year survival rates were analyzed. Multivariate Cox regression was used to identify predictors of survival using age, race/ethnicity, gender, and tumor characteristics (size, lymph node status, and stage). Of the 11,427 cases analyzed, the average age was 60.9 years, and 54.2% were female. The overall incidence rates for carcinoid tumors have increased significantly over the past 25 years, although rates for some sites have decreased (eg, appendix). The gastrointestinal tract accounted for 54.5% of the tumors. Within the gastrointestinal tract, the small intestine was the most common site (44.7%), followed by the rectum (19.6%), appendix (16.7%), colon (10.6%), and stomach (7.2%). The 5-year survival rates for the most common gastrointestinal sites were stomach (75.1%), small intestine (76.1%), appendix (76.3%), and rectum (87.5%). Using national, population-based cancer registry data, this study demonstrates that (1) incidence rates for carcinoid tumors have changed, (2) the most common gastrointestinal site is not the appendix (as is often quoted), but the small intestine, followed in frequency by the rectum, and (3) survival rates differ between individual anatomic sites.
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              Neuroendocrine carcinomas of the colon and rectum.

              This study was designed to review experience with neuroendocrine carcinomas of the colon and rectum at a single institution, with emphasis on the pathology and clinical characteristics of this uncommon malignancy. A study group of patients was identified from a prospective colorectal service database. Pathology was reviewed and neuroendocrine tumors were classified by a single pathologist. Medical records were retrospectively reviewed. From March 1975 to September 1998, 38 patients with neuroendocrine carcinomas were identified from the colorectal service database comprising 6495 patients (0.6 percent). These neuroendocrine carcinomas did not include carcinoid tumors. Average patient age was 57 years (range, 29-86 years). There were 17 males (44.7 percent) and 21 females (55.3 percent). Tumors were located as follows: 17 colon, 14 rectum, 6 anal canal, and 1 appendix. The diagnosis of neuroendocrine carcinoma was suggested preoperatively from tissue biopsy in 59.3 percent (16/27) of patients evaluable. Pathology was reviewed and tumors were categorized as small cell carcinoma (n = 22) or large cell neuroendocrine carcinoma (n = 16). Most tumors (20/25 evaluable, 80 percent) stained positive by means of immunohistochemistry for neuroendocrine markers, including chromogranin (18/19), synaptophysin (10/15), and/or neuron-specific enolase (14/15). Metastatic disease was detected at the time of diagnosis in 69.4 percent of the patients (25/36). Tumors were advanced at the time of diagnosis, with American Joint Committee on Cancer (AJCC) Stage I (n = 6), Stage III (n = 7), and Stage IV (n = 25) tumors. As a group, these tumors had a poor prognosis, with a median survival of 10.4 months. One-year, two-year, and three-year survival was 46 percent, 26 percent, and 13 percent, respectively. There was no significant difference in survival based on pathologic subtypes. Median follow-up time was 9.4 months (range, 0.6-263.7 months). Neuroendocrine carcinomas of the colon and rectum are uncommon, comprising less than 1 percent of colon and rectal cancers. Pathologically, these tumors are poorly differentiated carcinomas with distinctive cytoarchitectural features and are often immunoreactive for markers of neuroendocrine differentiation. The prognosis for high-grade neuroendocrine carcinomas is poor, as most patients have metastatic disease at the time of diagnosis.
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                Author and article information

                Journal
                suis
                Revista de la Universidad Industrial de Santander. Salud
                Rev. Univ. Ind. Santander. Salud
                Universidad Industrial de Santander (Bucaramanga, Santander, Colombia )
                0121-0807
                2145-8464
                August 2011
                : 43
                : 2
                : 203-210
                Affiliations
                [01] Bucaramanga orgnameUniversidad Industrial de Santander orgdiv1Departamento dePatología Colombia
                [03] Bucaramanga orgnameClínica Chicamocha orgdiv1Urgencias Colombia
                [02] Floridablanca orgnameClínica Carlos Ardila Lulle orgdiv1Laboratorio de Patología MEGA Colombia
                Article
                S0121-08072011000200011 S0121-0807(11)04300211
                3d8dc5b7-88f1-4c73-9c1b-6fd9ad6fd189

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 26 July 2011
                : 28 February 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 39, Pages: 8
                Product

                SciELO Colombia

                Categories
                Reporte de caso

                chromogranin,neuroendocrine,cecal appendix,Carcinoid tumors,cromogranina,neuroendocrino,apéndice cecal,Tumor carcinoide

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