Thermogram Categories

Breast thermography indicates levels of risk, as does any other objective means of evaluation, for confirming malignant disease. Breast thermograms can be divided into five categories. The categories are termed TH1 - TH5. These levels are based upon varying thermal features and the associated characterics of breast disease.

The first classification category is termed TH1. Thermograms in this category are devoid of any of the thermal signs associated with risk for malignant breast disease. This category defines a normal thermogram.

The second category is termed TH2. Thermograms in this category feature symmetrical, non-complex and moderately hyperthermic vascular-like features. These thermal features are frequently associated with benign changes in the breasts. The TH2 score does not indicate any sign of malignant disease, However annual thermograms for comparative restudy are recommended.

The third category is termed TH3. This category indicates an atypical metabolic or vascular process in the breast. This category is associated with a 10-20% risk of confirming malignant breast disease. It is likely that these atypical thermal features represent benign changes such as inflammation, acute cysts and/or fibroadenoma development, infection or personal variant, especially on an initial study. A thermogram restudy in 60 to 90 days usually provides a differentiation.

The fourth category, TH4, is considered a positive thermogram*, and represents a significant (65-85%) risk for malignant breast disease. A clinical correlation is indicated for palable mass or abnormal skin changes. However, it must be considered that a positive thermogram may precede positive results from other objective testing, such as mammogram or ultrasound, by 5-8 years.

The fifth category, TH5, designates a very high (approx. 95%) probability of confirming malignant breast disease. Benign processes or personal variant are very unlikely. A clinical correlation is indicated for palpable mass and abnormal skin changes. Clearly, a patient with such a score must be considered immediately for a comprehensive panel of objective evaluation. If, however, other objective means of evaluation do not demonstrate malignant breast disease, a thermography restudy in 60 to 90 days is recommended.

* A positive thermogram is not a diagnosis of breast cancer.

Mammography Comparison

© 2003. All Rights Reserved.