Rare finding of a large cell poorly differentiated neuroendocrine tumor in the colon

A 43 year old female presented to the emergency department for nausea, vomiting and abdominal pain secondary to a bowel obstruction subsequently revealed to be a poorly differentiated large cell neuroendocrine tumor of the colon. After a CT scan showed a mass in the ascending colon with possible metastasis to the right lobe of the liver, an exploratory laparotomy was performed. A hemicolectomy was performed with biopsy of the liver mass. Pathology was consistent with large cell neuroendocrine tumor in all specimens including the liver biopsy, ascending colon, and transverse colon. Although large cell neuroendocrine tumors of the colon are a rare malignancy, they are an important consideration in the workup of multiple colonic masses with metastases, especially in patients presenting with bowel obstruction. The literature on poorly differentiated large cell neuroendocrine cancer and treatment is reviewed. Poorly differentiated large cell neuroendocrine tumor is a rare pathology but should be included in the differential diagnosis in patients presenting with a colon mass and bowel obstruction.

Tumor carcinoide pulmonar: A propósito de un caso / The Pulmonary Carcinoid Tumor. A Case Report

El Tumor Carcinoide es un tipo de tumor cancerígeno formado por células neuroendocrinas. Representa el 1 al 2% de todos los tumores. En el pasado, fueron agrupados en una categoría de neoplasias denominada adenomas bronquiales. Se los consideraba benignos o poco agresivos. Se clasifican según su ubicación en centrales y periféricos y de acuerdo a su histología, dependiendo del número de mitosis y la presencia o no de necrosis, en típicos y atípicos. Tienen una gran variedad de presentación clínica, con diferentes grados de agresividad y pronóstico. Generalmente su diagnóstico es tardío. Nuestro objetivo fue presentar un caso pediátrico de Tumor Carcinoide pulmonar, central y típico.

The pulmonary carcinoid tumor (CT) is a type of cancerous tumor composed of neuroendocrine cells. It represents 1 or 2% of all pulmonary tumors. In the past, these tumors were grouped into a category of neoplasias called bronchial adenomas. They are considered benign or little aggressive. They are classified in central and peripheral tumors depending on their location and in histologic typical and atypical tumors depending on the number of mitosis and the presence or absence of necrosis. They have a wide variety of clinical presentation, with different degrees of aggressiveness and prognosis. The diagnosis is usually late. Our purpose was to present a pediatric case of central and typical pulmonary carcinoid tumor.

Mixed Large Cell Neuroendocrine Tumor and Adenocarcinoma of the Ovary / 대한산부인과학회지

Neuroendocrine tumor is a very heterogenous group arising from the neuroendocrine cells. Especially, large cell neuroendocrine tumor of the ovary is a extremely rare aggressive neoplasm, characteristically arising in association with a surface epithelial tumor. This report describes a mixed type of large cell neuroendocrine carcinoma and adenocarcinoma of the ovary. A 63-year old woman presented with abdominal distension and discomfort underwent staging laparotomy under the impression of ovarian cancer. The operation revealed an small ovarian mass with invasion of multiple region in peritoneal cavity by the tumor. Immunohistochemical and ultrastructural analysis confirmed the neuroendocrine nature of the tumor. The adenocarcinoma in this case is mixture of mucinous and endometrioid type. A diagnosis of stage IIIc mixed large cell neuroendocrine tumor and adenocarcinoma of the ovary was rendered. She is subsequently being treated with Paclitaxel and Carboplatin combination chemotherapy.