Growth dynamics of osteosarcomas in Beagles.

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Title Growth dynamics of osteosarcomas in Beagles.
Publication Type thesis
School or College School of Medicine
Department Neurobiology & Anatomy
Author Thurman, Gary Boyd
Date 1971-06
Description This study presents an analysis of the growth dynamics, oncogenic skeletal doses and skeletal locations of radiation-induced osteosarcomas in Beagles at the University of Utah, Division of Radiobiology as of March, 1970. Two hundred and fifty-six well-documented osteosarcomas have been induced in 201 Beagles, each receiving a single intravenous injection of 225Ra (80 tumors). 239 Pu (64 tumors), 228Ra (43 tumors), 228Th (56 tumors), 90Sr (8 tumors) or 224 Ra (5 tumors). Radiographs of each osteosarcoma were taken during the period of the tumor’s growth. The growth dynamics of these osteosarcomas were estimated by measuring the tumor dimension on as many radiographs as possible. It was clearly evident that the tumor volumes were increasing exponentially with time. Exponential growth constants were calculated for 249 tumors; the corresponding volume doubling times ranged from 4.7 to 60.3 days and averaged 12.4 days. Using individual exponential growth constants, a starting time for each tumor was estimated as the time when the extrapolated tumor’s growth curve reached the volume of one cell 10um (um = 10[-4]cm) in diameter. The accumulated average skeletal dose during the time from injection to tumor starting time was calculated for each tumor and called the oncogenic skeletal dose. It was found that the larger the amount of radionuclide injected, the larger the oncogenic skeletal dose. High incidences of radiation-induced osteosarcomas in the Beagles were noted in vertebrae, pelvic bones, humerii, femora and tibiae. Radiation-induced osteosarcomas of the vertebrae and pelvic bones and had much higher incidences than the corresponding incidences of naturally-occurring osteosarcomas in dogs.
Type Text
Publisher University of Utah
Subject Radiation Effects; Bone Saracomas
Subject MESH Animals, Laboratory; Neoplasms, Second Primary; Osteosarcoma
Dissertation Institution University of Utah
Dissertation Name PhD
Language eng
Relation is Version of Digital reproduction of "Growth dynamics of osteosarcomas in beagles." Spencer S. Eccles Health Sciences Library. Print version of "Growth dynamics of osteosarcomas in beagles." available at J. Willard Marriott Library Special Collection. QP6.5 1971 .T46.
Rights Management © Gary Boyd Thurman.
Format application/pdf
Format Medium application/pdf
Identifier us-etd2,19739
Source Original: University of Utah Spencer S. Eccles Health Sciences Library (no longer available).
Funding/Fellowship National Institute of Health Fellowship (5-F01-GM-38-740) from the National Institue of General Medical Sciences. The Internal Irradiation Program of athe Radiobiology Division, Anatomy Department, at the University of Utah is supported by the Atomic Energy Commission, contact AT(11-1)-119.
ARK ark:/87278/s6w6719r
Setname ir_etd
ID 192674
Reference URL https://collections.lib.utah.edu/ark:/87278/s6w6719r
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