Changes in the course of cancer

Many neoplasms cannot be cured but the life span of the patient afflicted with such diseases has in a remarkable number of cases been prolonged. The course of neoplastic diseases has been changed, improving life-style and survival on the one hand, but resulting in new side effects including multiple primary neoplasms on the other. In contrast to neoplastic diseases with aggressive acute development, we can observe an increasing number of neoplastic diseases with a chronic, prolonged that progress. To understand this it is necessary to remember that neoplastic diseases are heterogenic in nature, and also diseases of autonomic growth comprising modification of the host along with progression of the tumor.