[Diagnostic value of beta 2-microglobulin (BMG) in the serum of patients with infiltrative neoplasms of the bladder].

Observations of the behaviour of BMG in the blood serum (S-BMG) of 48 patients with infiltrative neoplasm of the urinary bladder indicated the increase of its concentration in 94% of patients. A correlation has been found between S-BMG and the stage of clinical advancement and histologic grading of the tumor. No statistically significant difference of values of S-BMG has been present in carcinoma and papilloma of the urinary bladder and recurrent neoplasms.