Changes in chicken embryo thymus after partial decerebration (including the hypophysis) and after hypophyseal or thymic allograft were investigated. Chicken embryos were partially decerebrated at 36-40 hr of incubation and on day 12 received a hypophysis or a thymus allograft from 18-day-old donor embryos. The thymuses of normal, sham-operated and partially decerebrate embryos were collected on...

Pituitary insufficiency secondary to internal carotid artery (ICA) aneurysm is a very rare condition. Its prevalence is reported as 0.17% (Heshmati et al., 2001). We present a case of pituitary insufficiency and hyperprolactinemia secondary to suprasellar giant intracranial aneurysm. A 71-year-old man was admitted to our clinic with symptoms of hypopituitarism, hyperprolactinemia, and visual fi...

The anatomy of the developing root of Arabidopsis is described using conventional histological techniques, scanning and transmission electron microscopy. The root meristem is derived from cells of the hypophysis and adjacent cells of the embryo proper. The postembryonic organization of the root is apparent in the mature embryo and is maintained in the growing primary root after germination. Cel...

Endocrine organs, such as the hypophysis, thyroid, endocrine pancreas, ovary and testis, of two specimens of the remora, Echeneis naucrates, were studied histologically to gain some knowledge about comparative anatomy and systematics. The specimens, one female and one male, were caught off the coast of Sado Island in the Japan Sea. Among four components of the hypophysis, the well developed par...

The objectives were to (a) describe the cytology and distribution of mammotropes in the human pituitary gland, (b) determine whether the mammotrope is a distinctive secretory cell type and (c) ascertain when it first appears in the fetal hypophysis. Identification of mammotropes was based primarily on the Sternberger peroxidase-antiperoxidase immunocytochemical method used with an antiserum to ...

interest in the possible influence of the hypophysis on the induction and growth of neoplasms. In 1932 Ball et al. (1) showed that the growth rate of 1,2,5,6-dibenzanthracene-induced tumors was slowed by hypophysectomy, their findings in dicating that the reduced growth rate was specifi cally due to the absence of the hypophysis. McEuen and Thomson (5), however, concluded that the retardation o...