Lack of efficacy of thermography as a screening tool for minimal and stage I breast cancer.

In a study of thermograms of 42 patients with Stage 1 or smaller carcinomas of the breast, 44 confounding cases and 64 randomly selected subjects being screened, we found that the ability of expert thermographers to identify the patients with carcinoma correctly (true positive = 0.238) varied little from the ability of untrained readers (true positive = 0.301). Furthermore, in the expert group, the indexes of suspicion were so high (0.436) and the true-positive levels were so relatively low (0.238, P = 0.0005) that thermography may well have a very limited role as a screening or pre-screening modality for the detection of minimal or Stage 1 breast cancers.