1. Selected aspects of differentiation in malignant neoplastic growth.- 2. Some biochemical aspects of the metastatic dissemination of tumor cells.- 3. Tumor dormant states in man.- 4. Regenerative potential, innervation and oncogenesis.- 5. Regression of neoplasms in man.- 6. Regression of neoplasms in vertebrates.- 7. Regression of neoplasms in invertebrates with special emphasis on mollusca.- 8. Tumor reversal and tumor suppression in plants.- 9. A biological approach to an understanding of regression.- 10. Preconditions in the host-tumor relationship during local recurrence.- 11. Response of the central nervous system to cancer: general features and cancer-related dementias.- 12. Increased intracranial pressure.- 13. Cardiac and pulmonary complications of cancer.- 14. Dermatologic effects of cancer.- 15. Hematologic complications of cancer from the species specific view.- 16. Endocrine and metabolic function in patients with neoplastic disease.- 17. Hormone production by tumors: ectopia or gene derepression.- 18. Immunosuppression by metastatic tumors.- 19. Abnormal variation of the immune system as related to cancer.- 20. Animal models for liver metastasis.- 21. Problems in the assessment of lung cancer risk posed by ambient air pollutants.- 22. Carcinogenic activity of drinking water as related to the tumor initiating and promoting activity of trihalomethanes.- Index of subjects.