EFFECT OF SURGERY ON T-LYMPHOCYTE SUBPOPULATION

The number of whole T-subpopulation cells and TM-helper and TG-suppressor cells are evaluated before major surgery and throughout the postoperative course by morphological and histochemical methods. All cells belonging to the T-subpopula­tion are reduced in number in the first and in the second postoperative day, returning to nearly pre­-surgical levels by the third postoperative day. Unchanged TMITG ratio after operation suggests unaffected immunoregulation.