The sensitivity of thermography to osseous metastases is compared to 99mTc bone scanning using the specificity of radiographic skeletal survey as proof of metastases. Thirty-five patients with suspected disease were selected for study. Bone scans detected 94.4%, while thermograms detected 22.2%. Thermography was insensitive to osseous metastases. Radionuclide bone scanning is the method of choice for the present.