Scanning electron microscopy of the human vas deferens epithelium following oestrogenic treatment.

Human vas deferens from 4 subjects submitted to a prolonged oestrogenic therapy was observed with SEM. The microvilli, characterizing the cell apices in the normal cases, are considerably reduced in number and length. Some cells show thin laminar folds (microplicae) arranged in a complicated labyrinth in the central zone of the apocal surface. The globular apical extrusions characterizing the normal vas deferens secretory cells are no longer present. These observations indicate the decrease of the absorbent capacity and the fall of the secretory function in the vas deferens epithelium following oestrogenic treatment.