Mast Cells in the Human Testis and Epididymis from Birth to Adulthood

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Abstract
Mast cells are a constant cell-type in the connective tissues of the human testis and epididymis from birth to adulthood. Ultrastructural study shows that these cells are similar to those found in other connective tissues. Histometric studies revealed that the number of mast cells in the interstitium, mediastinum and albuginea of the testis as well as in the epididymal connective tissue increases slightly during infancy, decreases during childhood, and then increases again at puberty. Increases at puberty are particularly evident in both the testicular interstitium and the epididymis. During adulthood, the number of mast cells progressively decreases in all testicular and epididymal connective tissues. Changes in mast cell number may be related to changes observed in the development of testicular connective tissue which occurs primarily during infancy and puberty.