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Related Concept Videos

Appendicitis-I: Introduction01:22

Appendicitis-I: Introduction

76
The appendix, a small, narrow, blind tube extending from the inferior part of the cecum, is widely regarded as a vestigial organ, having lost much of its original function through evolution. Despite its diminished role, the appendix can become inflamed, a condition known as appendicitis.
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...
76
Appendicitis-II: Diagnostic Studies and Management01:29

Appendicitis-II: Diagnostic Studies and Management

57
Diagnosing and managing appendicitis requires a structured and comprehensive approach that spans from initial assessment to postoperative care. Here is an overview of the process:
Diagnosing Appendicitis
It requires a multifaceted approach, starting with a detailed physical examination to pinpoint the location and nature of the pain and identify any associated symptoms. Laboratory tests play a crucial role. A complete Blood Count (CBC) typically reveals leukocytosis (an increased number of...
57

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Extragastrointestinal Stromal Tumor Mimicking Appendicitis: A Case Study.

Ricardo Martinez1, Michael Lezcano1, Jonak Randhawa1

  • 1School of Medicine, Saint George's University, St. George's, Grenada.

The American Journal of Case Reports
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Extragastrointestinal stromal tumors (E-GISTs) present diagnostic challenges due to mimicry of other abdominal conditions. Comprehensive imaging and histopathology are crucial for accurate diagnosis and effective management of these rare tumors.

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Area of Science:

  • Oncology
  • Gastroenterology

Background:

  • Extragastrointestinal stromal tumors (E-GISTs) are rare mesenchymal neoplasms originating outside the gastrointestinal tract.
  • E-GISTs originate from interstitial cells of Cajal and express specific markers like CD117 and DOG1.
  • Diagnostic challenges arise from atypical presentations mimicking common abdominal pathologies, such as acute appendicitis.

Purpose of the Study:

  • To report a case of E-GIST presenting with symptoms mimicking acute appendicitis.
  • To emphasize the importance of advanced imaging and histopathological analysis in diagnosing E-GISTs.
  • To discuss the management strategies for E-GISTs, including surgical resection and adjuvant therapy.

Main Methods:

  • A case report of a 75-year-old male patient with right lower quadrant pain.
  • Diagnostic workup included computed tomography (CT) scans revealing a large abdominal mass and a dilated appendix.
  • Surgical resection (right hemicolectomy) followed by histopathological examination and immunohistochemical staining.

Main Results:

  • CT scan identified an 11.3x9.2 cm heterogeneous mass and signs of appendicitis.
  • Histopathology confirmed E-GIST with spindle cell morphology and high mitotic activity.
  • Immunohistochemistry showed positivity for CD117, DOG1, Bcl-2, D2-40, and WT1 markers.

Conclusions:

  • Atypical E-GIST presentations necessitate thorough diagnostic evaluation, integrating imaging and immunohistochemistry.
  • Accurate diagnosis is critical for appropriate management, including surgical intervention and targeted adjuvant therapy (e.g., imatinib).
  • Optimizing postoperative care and exploring intraoperative biopsies are key for improving patient outcomes and reducing recurrence risk.