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Related Experiment Video

Updated: Jul 9, 2026

Fabrication of a Multiplexed Artificial Cellular MicroEnvironment Array

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Published on: September 7, 2018

Gl-NETs-uniform but also diverse.

Yogeshwar Dayal¹

¹GI Pathology, Northeast Region, Caris Diagnostics, Inc., 320 Needham Street, Suite #200, Newton, MA, USA. ydayal@carisdx.com

Endocrine Pathology

|December 7, 2007

Summary

Neuroendocrine tumors, initially called carcinoids, are a diverse group of neoplasms originating from the dispersed neuroendocrine cell system. Despite a century of study, their complexity and heterogeneity mean much remains to be discovered.

Area of Science:

Oncology
Endocrinology
Pathology

Background:

The term 'carcinoid' was introduced 100 years ago for indolent gastrointestinal tumors.
Initially believed to be confined to the gut, these tumors are now known to arise in various organs.
The concept evolved with the understanding of the dispersed neuroendocrine cell system, comprising over 20 distinct cell types.

Purpose of the Study:

To review the historical context and evolving understanding of carcinoid tumors.
To highlight the heterogeneity within this class of neoplasms.
To emphasize the ongoing need for research despite significant advancements.

Main Methods:

Historical review of carcinoid tumor research.
Conceptual analysis of the neuroendocrine cell system.

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Discussion of tumor classification and heterogeneity.

Main Results:

Carcinoid tumors are now understood as a family of neoplasms, not a single entity.
These tumors exhibit significant heterogeneity in origin, function, and behavior.
The dispersed neuroendocrine cell system provides a framework for understanding tumor diversity.

Conclusions:

Our understanding of carcinoid tumors has progressed substantially over the past century.
Despite progress, the complexity and heterogeneity of these tumors indicate that research is still in its early stages.
Further investigation is crucial to fully elucidate the biology and clinical management of neuroendocrine neoplasms.