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Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor
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Molecular and Immunologic Techniques in a Genetically Engineered Mouse Model of Gastrointestinal Stromal Tumor

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GASTROINTESTINAL STROMAL TUMOURS.

Kailash Chand1, T Chatterjee2

  • 1Classified Specialist (Pathology), Military Hospital (CTC) Pune.

Medical Journal, Armed Forces India
|August 10, 2017
PubMed
Summary
This summary is machine-generated.

Immunohistochemical (IHC) staining aids in classifying gastrointestinal spindle cell tumors. IHC identified smooth muscle differentiation in most tumors, revealing dual differentiation in one leiomyosarcoma.

Keywords:
DuodenumGastrointestinal stromal tumor (GIST)-stomachIleumJejunumSoft tissue tumors of GIT

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Area of Science:

  • Gastrointestinal Pathology
  • Oncology
  • Immunohistochemistry

Background:

  • Spindle cell tumors of the gastrointestinal tract (GIT) present diagnostic challenges.
  • Histologic parameters (HP) are traditionally used for categorization but can be limited.

Purpose of the Study:

  • To investigate the histogenesis of 10 GIT spindle cell tumors using immunohistochemical (IHC) staining.
  • To evaluate the role of IHC in identifying cellular lineage and differentiation.

Main Methods:

  • Retrospective analysis of 10 GIT spindle cell tumors over three years.
  • Histologic evaluation based on cell type, cellularity, growth pattern, and mitotic figures.
  • Immunohistochemical staining using Vimentin, Desmin, S-100, and non-specific enolase (NSE).

Main Results:

  • Tumors were categorized as benign (7), borderline (1), and malignant (2) based on HP.
  • Smooth muscle differentiation was confirmed in nine tumors (6 benign, 3 malignant) via IHC.
  • One case showed S-100 and NSE positivity, suggesting neural lineage, while another exhibited dual myogenic and neural differentiation.

Conclusions:

  • IHC is crucial for accurate cellular differentiation of GIT spindle cell tumors, often surpassing light microscopy.
  • Immunohistochemistry refines tumor classification and aids in understanding complex differentiation patterns.