1979年1月1日 · It is now recognized that these tumours are really of germ cell origin, the resemblance to fetal pineal tissue is in fact only superficial and the histological appearances to those familiar with this field are identical, both with light and electron microscopy, with those of the testicular seminoma, the ovarian dysgerminoma and other seminoma ...

This narrative review will integrate both old and recent information regarding the history, anatomy, histology, physiology, pathology and clinical implications of the pineal gland, and its secreted molecules: serotonin, melatonin and N,N-dimethyl-tryptamine.

2023年11月3日 · The pineal gland, or epiphysis is a small cone-like structure that comprises a part of the diencephalon. It is a neuroendocrine gland that secretes the hormone melatonin …

The conical-shaped pineal gland, or epiphysis cerebri, is attached by the pineal stalk to the roof of the diencephalon of the brain, from which it develops. The gland is surrounded by a capsule of pia mater and arachnoid elements; connective tissue septa penetrate the gland, subdividing it into indistinct lobules.

Recently, however, the remarkable progress in diagnosis and treatment of tumours of the pineal gland has done much to focus attention on the structure and exact anatomical relations of the human epiphysis, and the practical application of this work has demonstrated the necessity for further detailed investigation.

The pineal gland is a small-sized, photo neuroendocrine organ in the midline of the brain that synthesises and secretes melatonin and serotonin. Chords and islands of pinealocytes constitute the secretory parenchyma, while glial tissue and calcifications represent degenerative changes.

2011年8月1日 · This chapter summarizes the embryonic development and histogenesis of the pineal gland, and defines the histological features of pinealocytes and astrocyte-like cells in the pineal gland, with...

Histologically, the pineal gland shows pinealocytes, glial cells, and sometimes calcific concretions. Age-related changes in these three components have been reported by various workers. However, a statistically significant difference between the two sexes has not been found.

Inferior but somewhat posterior to the thalamus is the pineal gland, a tiny endocrine gland whose functions are not entirely clear. The pinealocyte cells that make up the pineal gland are known to produce and secrete the amine hormone melatonin, which is derived from serotonin.

2014年12月1日 · The pinealocyte are actually neuronal sensory cells which have both neural and hormonal efferentation. Histologically, pineal organs are composed of ependymal glial cells and pinealocytes. Pineal gland contains calcified concretions (corpora arenacea, acervuli or brain sand) measuring from some microns to several millimeters in diameters.