Results: Those neuropeptide immunoreactivities were mainly located in the medulla.The immunoreactive nerve fibers for every peptide were seen, and all of them contacted closely with the thymocytes.

• 结果：各神经肽的免疫反应性主要位于髓质，均可见到阳性神经纤维，并与胸腺细胞密切接触。