Circulating immune complexes in sera of patients with oral cancer.

Circulating immune complexes (IC) in the sera of patients with oral cancer have been measured by using polyethylene glycol (PEG) precipitation assay. At least 60% of patients with carcinomatous buccal mucosa were found to have markedly higher amounts of IC. Results have been discussed in view of other types of cancer and the various methods used for the assay of IC.