Related Experiment Videos
Noninflammatory breast carcinoma with skin involvement.
Uwe Güth1, Holger Moch, Linda Herberich
1University Women's Hospital, Basel, Switzerland. ugueth@uhbs.ch
Cancer
|January 28, 2004
Summary
Breast cancer with microscopic skin involvement has a better prognosis than classic skin changes. Histologic skin involvement indicates less malignant potential, suggesting these cases should not be T4 stage.
Area of Science:
- Oncology
- Pathology
- Surgical Oncology
Background:
- The TNM Supplement recommends T4 classification for breast carcinoma with macroscopic skin changes.
- Tumors with only histologic skin involvement, lacking clinical signs, are typically classified by tumor size (T1-3).
- Data supporting these TNM recommendations for skin involvement are limited.
Purpose of the Study:
- To evaluate the clinical significance of histologically proven skin involvement in breast carcinoma.
- To compare the malignant potential and clinical outcomes of breast cancers with and without clinically apparent skin involvement.
- To assess the prognostic implications of different degrees of skin involvement in breast cancer staging.
Main Methods:
- Seventy-six patients with noninflammatory breast carcinoma and confirmed histologic skin involvement were analyzed.
- Patients were divided into two groups: Group A (clinically obvious skin involvement) and Group B (histologic skin involvement without clinical signs).
- Reclassification was performed to assess tumor malignancy independent of the 'skin involvement' parameter.
Main Results:
- Group A patients showed significantly higher rates of extensive regional or distant disease (Stages IIIC and IV).
- Group B patients had a significantly more favorable clinical outcome, with 3-year survival rates of 92.3% (vs. 46.7% in Group A) and 5-year rates of 83.7% (vs. 38.1%).
- Group B also demonstrated significantly better distant recurrence-free survival (DRFS) rates at 3 and 5 years compared to Group A.
Conclusions:
- Breast carcinoma with histologic skin involvement represents a distinct clinical entity with a significantly better prognosis than cases with classic skin changes.
- The findings support the TNM classification recommendation that tumors with only histologic skin involvement should not be categorized as T4.
- Histologic skin involvement is associated with considerably less malignant potential compared to macroscopic 'classic' skin changes.