Signet ring cell carcinoma in a juvenile polyp.

Signet ring cell carcinoma in a juvenile polyp. Rev Esp Enferm Dig. 2019 Nov 13;111: Authors: Villar Lucas C, Hernando Martín M, Álvarez-Cuenllas B Abstract Juvenile polyps are hamartomatous lesions, usually unique, which appear at an early age. They are usually located in the rectosigmoid junction and are not thought to imply a higher risk of colorectal cancer. Here we report a case of signet ring cell (SRC) carcinoma in this type of lesion. PMID: 31718199 [PubMed - as supplied by publisher]
Source: Revista Espanola de Enfermedades Digestivas - Category: Gastroenterology Tags: Rev Esp Enferm Dig Source Type: research

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Mast cells constitutively express ß-catenin and expand in solid tumors such as colon and skin cancer. However, the role of ß-catenin signaling in mast cells and the cause or effect of mast cell expansion and tumor growth has yet to be established. In earlier studies we used mast cell depletion and protease staining approaches, to provide evidence for a causative role of mast cells in small bowel polyposis, and related specific phenotypes and distributions of tumor infiltrating mast cells to stages of tumor growth. Here we report that, stabilization of ß-catenin expands mast cells to promote high incidence...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Colorectal cancer (CRC) is the third most common cancer in both males and females in the UK, giving rise to approximately 40,000 new cancer cases per year. It arises from polyps as part of the adenoma-carcinoma sequence. Early detection can aid treatment and improve outcomes. Faecal immunochemical tests (FIT) and direct imaging using colonoscopy/sigmoidoscopy has been shown to be advantageous in the detection of polyps and earlier cancer. We review the evidence and provide summaries of current strategies as well as future potential developments.
Source: Surgery (Medicine Publishing) - Category: Surgery Authors: Tags: Intestinal surgery – I Source Type: research
An estimated 130,000 individuals are diagnosed with colorectal carcinoma each year, and approximately 50,000 will die from this disease, making colorectal carcinoma the third leading cause of cancer deaths in the United States.1 Heritable forms of colorectal carcinoma are common. These heritable conditions may manifest as a polyposis or as colorectal carcinoma. In this review, the pathology of hamartomatous polyps will be discussed with particular emphasis on clues that should alert pathologists to the possibility of a polyposis syndrome.
Source: Diagnostic Histopathology - Category: Pathology Authors: Tags: Mini-symposium: Gastrointestinal/Hepato-Pancreato-Biliary Pathology Source Type: research
Abstract A 60-year-old Caucasian male was diagnosed with lung adenocarcinoma and multiple metastases to the bone, spleen, and brain. He underwent radiotherapy for the brain and lumbar spine metastases, plus chemotherapy (cisplatin and pemetrexed). The chemotherapy was discontinued due to vomiting and hyponatremia, and nivolumab was then administered. Eight months later, 18F-fluorodeoxyglucose positron emission tomography showed tracer uptake in the colon. Colonoscopy revealed a reddish multinodular polyp in the sigmoid colon. The polyp showed irregular microvessels. No colonic mucosal surface structures were obser...
Source: Acta Med Okayama - Category: Universities & Medical Training Authors: Tags: Acta Med Okayama Source Type: research
CONCLUSIONS.—: Poor prognostic factors for malignant polyps include high tumor grade, presence of lymphovascular invasion, tumor less than 1 mm from resection margin, submucosal invasion deeper than 1 mm, and high tumor budding. These features should be assessed by the pathologist and communicated to the clinical team in order to allow proper management. PMID: 31509454 [PubMed - as supplied by publisher]
Source: Archives of Pathology and Laboratory Medicine - Category: Laboratory Medicine Authors: Tags: Arch Pathol Lab Med Source Type: research
In this study, we provide both correlative and functional evidence that senescent fibroblasts and an essential SASP factor, GDF15, induce physiological and molecular changes that promote the adenoma-carcinoma initiation and progression sequence in the colon. We assessed the role of senescence and the SASP in CRC formation. Using primary human colon tissue, we found an accumulation of senescent fibroblasts in normal tissues from individuals with advanced adenomas or carcinomas in comparison with individuals with no polyps or CRC. In in vitro and ex vivo model systems, we induced senescence using oxidative stress in c...
Source: Fight Aging! - Category: Research Authors: Tags: Daily News Source Type: blogs
Abstract Colorectal cancer (CRC) is one of the most common causes of cancer mortality in the world. The incidence is related to increases with age and western dietary habits. Early detection through screening by colonoscopy has been proven to effectively reduce disease-related mortality. Currently, it is generally accepted that most colorectal cancers originate from adenomas. This is known as the "adenoma-carcinoma sequence", and several studies have shown that early detection and removal of adenomas can effectively prevent the development of colorectal cancer. The other two pathways for CRC development ...
Source: Medicina (Kaunas) - Category: Universities & Medical Training Authors: Tags: Medicina (Kaunas) Source Type: research
esco Salvatore Colorectal cancer (CRC) is a leading cause of cancer death worldwide. It includes different subtypes that differ in their clinical and prognostic features. In the past decade, in addition to the conventional adenoma-carcinoma model, an alternative multistep mechanism of carcinogenesis, namely the “serrated pathway”, has been described. Approximately, 15 to 30% of all CRCs arise from neoplastic serrated polyps, a heterogeneous group of lesions that are histologically classified into three morphologic categories: hyperplastic polyps, sessile serrated adenomas/polyps, and the traditional...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Review Source Type: research
Abstract BACKGROUND AND AIM: Fecal calprotectin has successfully been widely recommended as a sensitive biomarker of inflammatory bowel diseases (IBD). Recently, we have identified an excellent new fecal biomarker, B-cell activating factor (BAFF), as effective as fecal calprotectin for diagnosing intestinal inflammation. Here in this study, we sought to investigate the potential of fecal BAFF as a screening marker for gastrointestinal inflammation and neoplasms in patients with abdominal discomfort. METHODS: 230 patients with abdominal discomfort were prospectively enrolled into this study and fecal samples w...
Source: Clinical and Developmental Immunology - Category: Allergy & Immunology Authors: Tags: Clin Exp Immunol Source Type: research
In addition to the adenoma to carcinoma sequence, colorectal carcinogenesis can occur via the serrated pathway. Studies have focused on clarification of categories and molecular features of serrated polyps, as well as endoscopic detection and risk assessment. Guidelines from the World Health Organization propose assigning serrated polyps to categories of hyperplastic polyps, traditional serrated adenomas (TSAs), and sessile serrated lesions (SSLs). TSAs and SSLs are precursors to colorectal cancer.
Source: Gastroenterology - Category: Gastroenterology Authors: Source Type: research
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