Induction of Malignant Bone Tumors in Rats by 1- (2-Hydroxyethyl) -1 -nitrosourea2

Abstract
Forty male MRC-W rats were treated chronically with 1-(2-hydroxyethyl)-1-nitrosourea in drinking water (total dose, 330 mg/rat). Fifteen rats (38%) developed osteogenic osteosarcomas or chondrosarcomas of the lower vertebrae. This was the first time that an orally administered organic compound induced a high incidence of these tumors.

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