[Regional different cell-proliferation in placetones (materno-fetal circulation-units) of mature human placenta (author's transl)].

The examinations presented are based on earlier histological, histochemical, ultra-histochemical and biochemical studies about regional differences of placental villi in the center and the periphery of the placentons (materno-fetal circulation-units) of mature human placentas. In this study the question was followed up whether the morphological "immature" imposing villi lying in the centers of the circulation-units are immature like the villi of placentas of earlier stages of pregnancy also referring their proliferation. Autoradiograms were made from specimens of placentas of 38.

[Aspiration biopsy in ovarian tumours].

The value of fine-needle aspiration biopsy in ovarian tumours is determined comparing cytological and histological findings. In our material of 53 cases cytological diagnostic accuracy is 92.6%.