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Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) as well as lymph vessels in the body.
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The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
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Thymic Epithelial Neoplasms: Tumor-Node-Metastasis Staging.

Marcelo F K Benveniste1, Sonia L Betancourt Cuellar1, Brett W Carter2

  • 1Division of Diagnostic Imaging, MD Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 1478, Houston, TX 77030, USA.

Radiologic Clinics of North America
|February 8, 2021
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Summary
This summary is machine-generated.

A new tumor-node-metastasis staging system for thymic epithelial neoplasms is now universally accepted. This system, developed by the International Association for the study of Lung Cancer and International Thymic Malignancy Interest Group, correlates with patient survival and outcomes.

Keywords:
StagingTNMThymic carcinomaThymic epithelial neoplasmsThymic neuroendocrine tumorsThymoma

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Area of Science:

  • Oncology
  • Thoracic Surgery
  • Pathology

Background:

  • Thymic epithelial neoplasms encompass thymoma, thymic carcinoma, and thymic neuroendocrine tumors.
  • Previous staging systems for these rare cancers lacked uniform interpretation and implementation.
  • Accurate staging is crucial for treatment decisions and prognostic assessment.

Purpose of the Study:

  • To introduce and highlight the significance of the recently developed tumor-node-metastasis (TNM) staging system for thymic malignancies.
  • To emphasize the universal acceptance and clinical utility of this new staging system.

Main Methods:

  • Development of a TNM staging system by the International Association for the study of Lung Cancer (IASLC) and the International Thymic Malignancy Interest Group (ITMIG).
  • Validation of the TNM system through correlation with patient survival and outcomes.

Main Results:

  • The IASLC/ITMIG TNM staging system has achieved universal acceptance in the clinical and research communities.
  • This universally accepted staging system demonstrates a strong correlation with patient survival and treatment outcomes.
  • Pathologic staging relies on histologic examination, while imaging is vital for clinical staging.

Conclusions:

  • The new IASLC/ITMIG TNM staging system provides a standardized and reliable method for classifying thymic epithelial neoplasms.
  • This standardized approach is essential for consistent clinical management and comparative research.
  • Imaging's role in clinical staging complements pathologic assessment for comprehensive patient evaluation.