The Pathology of Americium 241

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Abstract
Male CBA-mice were injected intraperitoneally with different doses of 241Am-citrate (16, 8, 0.4, 0.2, 0.04 muCi/kg). The two highest doses were highly destructive of the haematopoietic tissues, testes and bone tissue. The highest frequency of induced tumours of the skeleton and haematopoietic tissue was found in the 8 muCi group. In the liver, adrenal glands, kidney and heart degenerative lesions were found mainly in the higher dose groups. In the lower dose groups degenerative lesions seemed to appear earlier and at a higher frequency than in the control group.