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Histology of the Small Intestine

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The small intestine exhibits a unique histological structure that significantly enhances its function in digestion and nutrient absorption. These structures include circular folds, villi, and various specialized cells that collectively facilitate the digestion of food.
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...

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Establishment and Characterization of Small Bowel Neuroendocrine Tumor Spheroids

Establishment and Characterization of Small Bowel Neuroendocrine Tumor Spheroids

Published on: October 14, 2019

Current characteristics on small intestinal stromal tumor-a case control study.

Lifang Zhao¹, Zhigang Zhao², Weidong Wang³

¹National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Air Force Military Medical University, Xi'an 710032, China.

Annals of Palliative Medicine

|February 2, 2020

Summary

Small intestinal stromal tumors (SISTs) are rare but aggressive gastrointestinal tumors. Larger tumor diameter and higher nuclear division are key indicators of adverse outcomes in SIST patients.

Keywords:

CD117 DOG1 Gastrointestinal stromal tumor (GIST)Small intestine stroma tumor (SIST)

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Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor

Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor

Published on: May 2, 2022

Area of Science:

Gastroenterology
Surgical Oncology
Pathology

Background:

Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors of the GI tract.
Small intestinal stromal tumors (SISTs), a subtype of GIST, occur in the small intestine and have a higher malignancy incidence than gastric GISTs.
Research on SISTs is limited despite their clinical significance.

Purpose of the Study:

To analyze the clinical manifestations, histopathological features, and prognostic factors of small intestinal stromal tumors (SISTs).
To improve the understanding and clinical management of SISTs through statistical analysis.

Main Methods:

Retrospective study of 75 patients with SIST who underwent surgical resection.
Analysis of clinical data, histopathological and immunohistochemical features, and auxiliary examination results.
Cox regression analysis to identify independent risk factors for adverse outcomes.

Main Results:

Gastrointestinal bleeding was a more frequent presentation than abdominal mass.
The jejunum was the most common location for SISTs.
Tumor diameter ≥ 5.3 cm and nuclear division > 5/50 HPF were identified as independent risk factors for adverse postoperative outcomes.
Spindle-epithelioid cell type was exclusively observed in patients with adverse outcomes.

Conclusions:

This study provides valuable clinical statistics on SIST patients.
The findings enhance the understanding of SISTs and offer guidance for diagnosis and treatment.
Identifying key prognostic factors can aid in risk stratification and patient management.