The tretinoin had also good effect on chronic atrophic gastritis, but the rats showed a worse general condition, which suggested Sanqis action on precancerous lesion of chronic atrophic gastritis.

• 维甲酸对胃粘膜病变亦有明显的改善作用，但大鼠的全身状态较差，提示中药三七治疗慢性萎缩性胃炎癌前病变具有一定优势。