NT 3 ir cells belonged to the stroma cells of spleen and scattered mainly in the periarterial lymphoid sheath (PALS), lymphatic follicles and the inner wall of the blood vessels.

• NT－3－ir细胞属于网状细胞， 主要散布于动脉周围淋巴鞘（PALS）、淋巴小结和血管内壁。