Increased renal transplant size is a criterion of acute rejection. Statistically significant increases in ultrasonically measured kidney graft dimensions were demonstrated in 8 recipients of living related donor kidneys who never had rejection crises. After an average followup of 4.9 ± 3.8 months (range 2 to 12 months), anteroposterior, cross-sectional and pole-to-pole measurements were increased by 0.75, 1.9 and 0.58 cm., respectively. Some increase in kidney graft size is normal and should not be confused with acute rejection.
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