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Related Experiment Video

Updated: Jun 19, 2026

Multi-photon Imaging of Tumor Cell Invasion in an Orthotopic Mouse Model of Oral Squamous Cell Carcinoma
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Multi-photon Imaging of Tumor Cell Invasion in an Orthotopic Mouse Model of Oral Squamous Cell Carcinoma

Published on: July 25, 2011

Extracapsular spread in oral squamous cell carcinoma.

Richard J Shaw1, Derek Lowe, Julia A Woolgar

  • 1Regional Maxillofacial Unit, University Hospital Aintree, Liverpool, United Kingdom. richard.shaw@liv.ac.uk

Head & Neck
|October 15, 2009
PubMed
Summary

Extracapsular spread (ECS) in oral squamous cell carcinoma (OSCC) significantly worsens prognosis. Identifying ECS is crucial for accurate staging and patient outcomes.

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Area of Science:

  • Oncology
  • Head and Neck Surgery
  • Pathology

Background:

  • Extracapsular spread (ECS) in cervical lymph nodes is a major negative prognostic factor for oral squamous cell carcinoma (OSCC).
  • Accurate identification of ECS is critical for effective treatment planning and patient counseling.

Purpose of the Study:

  • To evaluate the prognostic significance of ECS in OSCC.
  • To assess the impact of ECS on recurrence, metastasis, and survival.
  • To identify predictors of ECS and evaluate imaging sensitivity.

Main Methods:

  • Analysis of a consecutive cohort of 400 OSCC patients treated with primary surgery.
  • Assessment of ECS presence, macroscopic vs. microscopic, and its correlation with clinical outcomes.
  • Evaluation of MRI neck staging sensitivity and identification of independent predictors for ECS.

Main Results:

  • ECS was present in 25% of patients, significantly increasing local recurrence, distant metastases, and regional failure.
  • Recurrences were earlier in ECS cases (206 vs. 334 days).
  • Five-year overall survival was 19% for macroscopic ECS versus 31% for microscopic ECS; MRI showed poor sensitivity, especially for microscopic ECS. Age >75, smoking, and alcohol use predicted ECS.

Conclusions:

  • ECS is a critical prognostic indicator in OSCC, necessitating its reporting for accurate staging.
  • Patients with OSCC and ECS should be classified as pN3 due to their poor prognosis.
  • Factors like age, smoking, and alcohol may influence immunosurveillance, contributing to ECS development.