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Renewal of Intestinal Stem Cells01:23

Renewal of Intestinal Stem Cells

The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the goblet,...

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Related Experiment Video

Updated: Jun 24, 2026

Establishment and Characterization of Small Bowel Neuroendocrine Tumor Spheroids
09:43

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Published on: October 14, 2019

[Primary small bowel adenocarcinoma].

Jaime Ruiz-Tovar1, Enrique Martínez-Molina, Vicente Morales

  • 1Departamento de Cirugía General y del Aparato Digestivo, Hospital Universitario Ramón y Cajal, Madrid, España. jruiztovar@gmail.com

Cirugia Espanola
|April 7, 2009
PubMed
Summary

Primary small bowel adenocarcinoma is rare, often diagnosed late. Surgical resection offers curative potential, with ileal location and absence of metastases correlating with better outcomes in this study.

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Area of Science:

  • Gastroenterology
  • Surgical Oncology
  • Oncology

Context:

  • Primary small bowel adenocarcinoma is an uncommon malignancy.
  • Non-specific symptoms frequently lead to delayed diagnosis and poorer patient outcomes.
  • This study analyzes the management and outcomes of primary small bowel adenocarcinoma.

Purpose:

  • To evaluate the clinical experience and management strategies for primary small bowel adenocarcinoma.
  • To identify prognostic factors influencing patient survival.
  • To assess the impact of tumor location, lymph node status, and retroperitoneal infiltration on outcomes.

Summary:

  • A retrospective analysis of 17 patients with primary small bowel adenocarcinoma was conducted.
  • Surgical resection was the primary curative treatment. Ileal location was associated with significantly better survival (58 months vs. 15 months for duodenal/jejunal).
  • Factors associated with poorer prognosis included advanced stage, lymph node metastases, non-resected disease, and retroperitoneal infiltration.

Impact:

  • Highlights the importance of surgical resection for curative intent in small bowel adenocarcinoma.
  • Identifies ileal location as a favorable prognostic indicator.
  • Emphasizes that retroperitoneal infiltration may represent a non-resectability criterion, impacting treatment decisions and patient outcomes.