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1·In the lymph node, the senescent cells mainly appeared in the zone between lymph nodules, and in the medullary cord and sinus.

淋巴结内衰老细胞主要分布于皮质淋巴小结之间和髓质。

2·Objective:To observe the histomorphologica l outcome of medullary ischemia caused by anterior spinal cord artery injury, research the pathologic mechanism.

目的：观察脊髓前动脉损伤后脊髓组织形态学演变过程，研究病理机制。