title: Factors contributing to tumour growth after irradiation.
abstract: Rhabdomyosarcomas of the rat were irradiated with 15 Gy of X-rays and the changes in several parameters were measured as a function of time. In the course of 10 days after irradiation, the percentage of tumour cells changes by a factor of 10, the fraction of clonogenic cells by a factor of 20, and the volume of tumour cell nuclei by a factor of nearly 3. During the same time interval, tumour volume increases only by 50%, indicating that volume curves yield little information about the drastic changes occurring in tumours during the first 2 weeks after irradiation.
mesh_terms: D000818:Animals; D002452:Cell Count; D002467:Cell Nucleus / Q000528:radiation effects; D002999:Clone Cells / Q000528:radiation effects; D004273:DNA, Neoplasm / Q000378:metabolism; D051381:Rats; D012208:Rhabdomyosarcoma / Q000378:metabolism / Q000473:pathology / Q000532:radiotherapy*; D012513:Sarcoma, Experimental / Q000378:metabolism / Q000473:pathology / Q000532:radiotherapy; D013997:Time Factors
chemical_list: D004273:DNA, Neoplasm