Cryptorchid and Scrotal Human Testes. I. Cytological, Cytochemical and Quantitative Studies

Glycogen and Related Enzymes in Normal and Cryptorchid Human Testes: A Cytochemical Study

“…The observations in this study concerning the variations in glycogen distribution in the seminiferous tubules during testicular maturation agree with the available data (Mancini et al, 1952(Mancini et al, , 1965Fabbrini, Re & Conti, 1969 Cross-sections of human testicular biopsy material. Fig.…”

“…The presence of glycogen has been demonstrated in the seminiferous tubule of the adult human testis (Arzac, 1950;Elftman, 1952;Long & Engle, 1952;Montagna, 1952;Mancini, Nolazco & De la Balze, 1952) and its distribution has been shown to vary with testicular maturation (Mancini, Rosemberg, Cullen, Lavieri, Vilar, Bergadá & Andrada, 1965;Fabbrini, Re & Conti, 1969). Chemical and cytochemical studies involving rat testis have tended to confirm this finding (Leiderman & Mancini, 1969).…”

In Vitro Conversion of3H-Pregnenolone by Human Testicular Tissue from Fetal Age to Senescence

“…On the other hand, a neonatal boy, 3 weeks old, produced small amounts of testosterone. These variations in testicular steroidogenesis seem to correspond with the variations in the number of morphologically distinguishable Leydig cells in the testes from the neonatal period to puberty [15].…”

“…Previous information concerning the rate of human testicular steroid conversion in vitro was obtained utilizing incubation with radiolabeled precursors [2,4,12,15,18,21,221. In the present study the conversion of pregnenolone in vitro by testicular tissue from human males of different ages was analyzed using a standard technique.…”

Impaired Dna Synthesis by Early Pubertal Cryptorchid Testis In Vitro

“…Such changes are apparent at a young age of 2 years [16]. A decrease in the relative number of spermatogonia is evident from infancy but is not significant during the early phase of puberty [9]. The spermatogonial content per tubule is similar to controls within 2 years of age [6].…”