Lesion counts and average severity grades for Male Rats
3/16/2005 Lesion counts and average serverity grades for Male Rats in
METHYL ISOBUTYL KETONE
Dose CONTROL 450 PPM 900 PPM 1800 PPM
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Kidney Renal counts 0/50 3/50 4/50 6/50
Tubule Hyperplasia
(Step Sections) average
severity NA 2.0 2.0 2.3
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Kidney Renal
Tubule Hyperplasia counts 1/50 14/50 7/50 21/50
(Step Sections and
Original Sections)
average
severity 2.0 2.9 2.0 2.5