In an attempt to differentiate among histologic types of lung cancer, a modified humoral leukocyte adherence inhibition (H-LAI) assay was used. All types of lung cancer gave positive H-LAI indices against both homologous and autologous tumor extracts of the relevant histologic types. Positive H-LAI values were obtained even with unrelated tumor extracts. Cross-reactivity suggests that common antigen determinants or antigens of broad specificity play a role in the H-LAI assay.

No abstract