Abstract
Summary
Three days after labeling one member of parabiotic pairs of C57B1 or AKR mice, labeled migrant cells were observed in the thymus in every normal unlabeled 2 or 7 months old partner. Thymic migrant cells were less frequent than in the lymph nodes and spleen and were located mainly in the medulla or in the junctional region between the cortex and the medulla. Migrant cells in the thymus cortex were commonly in the perivascular space surrounding cortical blood vessels.
The authors are indebted to Misses V. Carman and J. Lampel for technical assistance in these experiments.
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