[Initial concentration of the neoplastic biological markers AFP (alpha fetoprotein), HCG (chorionic gonadotropin), and SP1 (specific pregnancy protein) in separate types and stages of clinically advanced lung cancer].

Determination of neoplastic biological markers has been done in 709 patients including determination of AFP in 142, HCG in 324 and SP1 in 243 cases. Among 142 patients in whom AFP has been determined in 2 cases only (1.4%) the elevated level has been present. Elevated levels of HCG have been found in 19 out 324 cases (5.9%) and SP1 in 29 out 243 cases (11.9%).