Lifetime follow-up of USTUR Case 246 demonstrated the lack of severe b
iological effects resulting from his exposure to Am-241. Deterministic
effects observed were limited to hematological changes, including lym
phopenia and thrombocytopenia, These hematological changes were consis
tent with those observed in experimental animals following actinide ex
posure. Cataracts were removed from the left and right eyes at 547 and
1,030 d after the accident, respectively, but were considered to be t
rauma-induced rather than radiation-induced. No abnormal findings were
reported from gross or histological examinations of tissue samples re
moved at autopsy, other than those resulting from the subject's preexi
sting cardiovascular disease.