[Reactive changes of the thymus and spleen in response to surgical intervention]

Histostructure of the thymus and spleen was studied after a sham operation, unilateral nephrectomy and 2/3 hepatectomy. The alterations observed corresponded to those in stress. The differences were seen in intensity and changes in the spleen periarterial zones. These zones were wasted 4-72 hours after the sham operation while their cellularity was increasing after nephrectomy and hepatectomy. The structure of the thymus got partially restored by day 5-7, while blast transformation and plasmatization of splenic cells was not yet completed.