Blood flow in transplanted tumors: quantitative approaches to radioisotopic studies.

Descriptions of the weight of a tumor and the magnitude of its blood flow have been of interest for a number of years. Despite this, there have been no reported attempts to provide quantitative relationships between the tumor's weight and its rate of perfusion. An initial approach to such a relationship, which adequately describes all known data in the literature thus far, is given in the present communication. In this inquiry, we are hampered by a lack of knowledge as to possible "cause and effect." However, we will arbitrarily describe blood flow as a function of tumor weight, and seek interrelations. Such an approach has only become possible in the last few years with the availability of radioisotopic techniques for estimating "functional" blood flow distribution.