[Secretion of immunoglobulins in malignant melanoma of the skin].

The study was concerned with the dynamics of correlations between IgA, IgM and IgG levels involved in pigmented neoplasm development in 154 cancer patients and 75 healthy subjects. The dynamics was found to represent stages of tumor development rather than changes in absolute indexes of serum immunoglobulin concentrations. The nature of changes in the structure of correlations suggested a possible switch from IgM to IgG and IgM to IgA secretion, i.

[State of the stroma in melanoma in patients with different delayed hypersensitivity reaction to neoplasm antigen].

The data are reported on studying the stromal response of 19 melanomas of analogous localization, showing the same type of growth, histological structure, the level of invasion and area of ulceration in patients with positive and negative delayed hypersensitivity reaction to injection of the polysaccharide fraction from melanoma tissue. A high degree of pronouncement of lymphoid-cellular infiltration of tumor stroma correlated with a positive delayed hypersensitivity response, whereas a low degree -- with a negative one.