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Establishment and Characterization of Small Bowel Neuroendocrine Tumor Spheroids
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Pathology of Gastrointestinal Neuroendocrine Tumors: An Update

Roger K Moreira1, Kay Washington2

  • 1Department of Pathology, Columbia University Medical Center, 630 West 168th Street, New York, NY 20032, USA.

Surgical Pathology Clinics
|February 4, 2016
PubMed

Insights

Gastrointestinal neuroendocrine tumors (GI NETs) are diverse neoplasms with varying behaviors. This review covers their classification, grading, staging, and diagnostic considerations.

Area of Science:

  • Gastroenterology and Oncology
  • Pathology
  • Endocrinology

Background:

  • Gastrointestinal neuroendocrine tumors (GI NETs) are a heterogeneous group of neoplasms.
  • Most GI NETs are sporadic, with a minority linked to hereditary conditions like multiple endocrine neoplasia type 1.
  • Tumor behavior and hormonal secretion vary significantly based on tumor site.

Purpose of the Study:

  • To provide a comprehensive overview of gastrointestinal neuroendocrine tumors.
  • To discuss the evolving WHO classification, grading, and staging recommendations for GI NETs.
  • To highlight diagnostic challenges and potential pitfalls in identifying these tumors.

Main Methods:

  • Review of current literature on GI NETs.
  • Discussion of histopathological features and diagnostic markers.
  • Analysis of site-specific characteristics and clinical behaviors.

Main Results:

  • GI NETs exhibit significant heterogeneity in hormonal secretion and clinical presentation.
  • A 4-category WHO classification is increasingly adopted for GI NETs.
  • Histologic examination is typically sufficient for diagnosis, with immunohistochemistry used in select cases.

Conclusions:

  • Accurate classification, grading, and staging are crucial for managing GI NETs.
  • Understanding site-specific features aids in diagnosis and treatment planning.
  • Awareness of diagnostic pitfalls is essential for optimal patient care.
Keywords:
CarcinoidGastrointestinalNeuroendocrine

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