Sixty-four canine cutaneous round cell tumors were divided into 25 mast cell. tumors, I5 histiocytomas, nine cutaneous lymphosarcornas and 15 transmissible venereal. tumors. The final diagnosis was made from cytologic, clinical and histologic findings.
Gonadotropin-releasing hormone (GnRH) Written By: Gonadotropin-releasing hormone (GnRH), also known as luteinizing hormone-releasing hormone, a neurohormone consisting of 10 amino acids that is produced in the arcuate nuclei of the hypothalamus. GnRH stimulates the synthesis and secretion of the two gonadotropinsâluteinizing hormone (LH) and follicle-stimulating hormone (FSH)âby the anterior pituitary gland.
LH and FSH are secreted from cells in the anterior pituitary gland, and are called gonadotropins because of their role in stimulating the gonads. The principle regulator of LH and FSH secretion is gonadotropin-releasing hormone (GnRH). GnRH is secreted from the hypothalamus.GnRH stimulates secretion of LH and FSH, which in turn stimulates gonadal secretion of the sex steroids testosterone, estrogen and progesterone (see diagram at left).nRH is secreted from the hypothalamus. GnRH stimulates secretion of LH and FSH, which in turn stimulates gonadal secretion of the sex steroids testosterone, estrogen and progesterone (see diagram at left).