Treatment is usually curative with wide-margin surgical excision but due to the malignant nature of these tumors, recurrence should be considered and regular monitoring is recommended. 1  Gianella P et al (2012) Primary cutaneous undifferentiated round cell tumor with concurrent polymyositis in a dog. Can Vet J 53(5):549-553. Mackowiak II et al (2012) E-cadherin in canine mast cell tumors: Decreased expression and altered subcellular localization in Grade 3 tumors. Vet J 194(3):405-11.
Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct.The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.The hypothalamus and pituitary gland are neuroendocrine organs.Local chemical messengers, not generally considered part of the endocrine system, include autocrines, which act on the cells that secrete them, and paracrines, which act on a different cell type nearby.he hypothalamus and pituitary gland are neuroendocrine organs. Local chemical messengers, not generally considered part of the endocrine system, include autocrines, which act on the cells that secrete them, and paracrines, which act on a different cell type nearby.
Lesson Summary. Let's review. The pineal gland is a tiny endocrine gland found in the brain. It produces and secretes the hormone melatonin, which is a hormone that helps regulate biological rhythms such as sleep and wake cycles.The secretion of melatonin is inhibited by light and triggered by darkness.hile the full function of the pineal gland is still somewhat mysterious, we do know that it secretes the hormone melatonin. Melatonin is a hormone from the pineal gland that helps regulate biological rhythms such as sleep and wake cycles.