[Determination of beta2-microglobulin in breast, lung, colorectal and ENT carcinoma (author's transl)]

Significant increase of plasma level beta2-microglobulin in cancer patients (breast, bronchus, colorectal and ENT) occurs rarely. More, the highest levels observed are within the range of non malignant diseases. We cannot assume that beta2-microglobulin assay will be useful as tumor marker.