1. Host defense mechanisms against tumors as the principal targets of tumor promoters

   • R. Keller

   Guest Editorial Pages: 203 - 211

2. Influence of vasoactive drugs on the intratumor distribution of blood flow and vascular volume in a transplantable rat fibrosarcoma

   • L. Karlsson
   • A. Alpsten
   • H.-I. Peterson

   Original Papers Pages: 212 - 220

3. Gut endocrine cells in rat intestinal-tract carcinoma induced by 1,2-dimethylhdrazine

   • F. Shimamoto
   • E. Tahara
   • N. Yanaihara

   Original Papers Pages: 221 - 230

4. Simultaneous occurrence of receptors for estradiol, progesterone, and dihydrotestosterone in canine mammary tumors

   • H. Elling
   • F. R. Ungemach

   Original Papers Pages: 231 - 237

5. Carcinoembryonic antigen (CEA) in human colorectal cancers growing subcutaneously in nude mice

   • H. H. Fiebig
   • S. von Kleist

   Original Papers Pages: 238 - 242

6. Effects of radiation on murine T-cell leukemogenesis induced by butylnitrosourea

   • H. J. Seidel
   • S. Bischof

   Original Papers Pages: 243 - 249

7. Chemotherapeutic study on Yoshida sarcoma ascites cells implanted into the glandular stomach of rats

   • G. Eichler
   • M. Habs
   • D. Schmähl

   Original Papers Pages: 250 - 257

8. Perinatal carcinogenicity of isoniazid (INH) in swiss mice

   • Malini M. Menon
   • S. V. Bhide

   Original Papers Pages: 258 - 261

9. Studies on the tumor-inhibiting efficacy of Iscador in experimental animal tumors

   • M. Berger
   • D. Schmähl

   Original Papers Pages: 262 - 265

10. Studies on the so-called “synchronization therapy” of tumors with vincristine

    • B. Schultze
    • W. Jellinghaus
    • W. Maurer

    Original Papers Pages: 266 - 274

11. The haematogenous spread of tumor: A prevental process

    • R. Stein-Werblowsky

    Erratum Pages: 274 - 274

12. Identification of three indolic compounds in a pigmented-melanoma cell-culture supernatant by gas chromatography-mass spectrometry

    • S. Pavel
    • F. A. J. Muskiet
    • W. van der Slik

    Original Papers Pages: 275 - 279

13. Microfluorimetric and X-ray microanalytic studies on the DNA content and Na⁺:K⁺ ratios of the cell nucleic in various types of thyroid tumors

    • G. L. Lukács
    • I. Zs.-Nagy
    • Gy. Balázs

    Original Papers Pages: 280 - 284

14. On the ultrastructure of the gastric “borderline lesion”

    • J. F. Riemann
    • H. Schmidt
    • P. Hermanek

    Original Papers Pages: 285 - 291

15. Population based pathology statistics of oesophageal carcinoma

    • K. Kayser
    • H.-U. Burkhardt

    Original Papers Pages: 292 - 298

16. Preputial tumors induced by intragastric intubations of 7,12-dimethylbenz(a)anthracene in gonadectomized female and male rats

    • Hiroki Yoshida

    Short Communication Pages: 299 - 302

17. Experimental evidence for a hyperthermia-induced breakdown of tumor blood flow during normoglycemia

    • P. Vaupel
    • W. Müller-Klieser
    • H. Gabbert

    Letter to the Editor Pages: 303 - 304