Some hypophyseal adenomas are discrete, well-marked lesions, which can be curatively removed by surgical resection, while others seem aggressive, invasive, recidive-prone, most often progressing in spite of any pharmacological, surgical or radiotherapeutical interventions. There is also a great variability within the incidence of aggression and invasion among the various types of hypophyseal im...

It is the primary purpose of this review to examine the problem of the genesis of tumors of the pituitary gland following thyroid removal or destruction by radioiodine. Since this problem is now under active investigation, it is hoped that such a summation of the pertinent data may be helpful in evaluating what has been done and in orienting research that may follow. Radioiodine-induced hypophy...

Animal populations living in geographically variable environments respond to different selection pressures. The adaptive character of the responses to environmental information determines the degree of synchrony of the breeding period with local optimal conditions. An example is provided by two populations of Mediterranean blue tits (Parus caeruleus) in Corsica, breeding in different habitats, ...

1.1 Regulation of female reproductive system Regulation of female reproductive system consists of very complex interactions between the hypothalamus, neurohypophysis and ovaries. Beginning from the embryologic stage, female reproductive system is regulated by the brain. Ovarian hormone production is supressed by the hypothalamo-hypophyseal control mechanism till the end of the childhood period ...

A mixture of 50-60% monomeric methyl methacrylate and 40-50% monomeric 2-hydroxypropyl methacrylate was supplemented with 1.5% benzoyl peroxide (catalyst) and 1.5% N,N-dimethylaniline (accelerator) and injected into glutaraldehyde-perfusion fixed rat hypophyseal and other endocrine organ blood vessels and biliary tracts. This injection medium rapidly polymerized at room temperature and did not ...

Hypothalamic hamartoma is a rare congenital lesion. We present the case of a 7-year-old girl who suffered from precocious puberty, the cause of which was diagnosed by using MR imaging and CT as pedunculated hypothalamic hamartoma associated with a large craniopharyngeal canal and sellar spine mimicking pituitary duplication.

Small pieces of ovarian, testicular, or ovarian plus hypophyseal tissue were transplanted to the anterior eye chambers of rats, aged ~ months, which were simultaneously gonadeetomized. One year after the operations the animals were examined. The ovarian and testieular grafts had taken and had been t ransformed to tumors in a very high percentage of cases. The ovarian and testieular tumors were ...