[Indirect immunofluorescence with autoantibodies on cryostat sections of human tumors]

31 carcinomata, 14 benign neoplasms, 3 mastopathies and human placenta tissue were investigated with autoantibodies of defined specificity using an indirect immunofluorescence method. In the cells of carcinomata and the trophoblast layer of the placenta studied, immunofluorescent staining with antimitochondrial antibodies were strongly positive and membranously when compared with cells of benign tumors. The negative results obtained with other autoantibodies in the same material indicate the specificity of the reaction.