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Related Experiment Videos

Predicting lymph node metastases in rectal cancer

T J Saclarides1, A K Bhattacharyya, C Britton-Kuzel

  • 1Department of General Surgery, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois 60612.

Diseases of the Colon and Rectum
|January 1, 1994
PubMed
Summary
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Histologic assessment of rectal cancer can predict lymph node metastasis. Features like poor differentiation, deep invasion, and specific tumor configurations are key indicators for guiding treatment decisions after local excision.

Area of Science:

  • Oncology
  • Surgical Pathology
  • Gastrointestinal Cancer Research

Background:

  • Local excision offers a sphincter-saving option for selected rectal cancers.
  • Histologic evaluation is crucial to identify high-risk features after local excision.
  • Ominous features may necessitate further treatment like radical resection or irradiation for lymph node metastases.

Purpose of the Study:

  • To identify specific histologic and morphologic features that predict lymph node metastasis in rectal cancer.
  • To determine predictors of nodal disease in radically excised rectal cancers.

Main Methods:

  • Review of nine histologic and morphologic features in 62 radically excised rectal cancers.
  • Statistical analysis (chi-squared) to assess the association between features and nodal disease.

Related Experiment Videos

  • Variable analysis to identify the strongest predictor of nodal disease.

    • Main Results:

    • Worsening differentiation, increasing depth of penetration, microtubular configuration (≥20%), venous invasion, and perineural invasion were significant predictors of nodal disease.
    • Lymphatic invasion, though infrequent, was associated with nodal metastases in all cases.
    • Broder's classification emerged as the strongest predictor of nodal disease among all factors examined.

    Conclusions:

    • In-depth histologic assessment is essential for rectal cancers amenable to local excision.
    • Statistical evaluation of histologic features can predict the likelihood of nodal metastases.
    • This aids in determining the need for further treatment beyond local excision.