There have been isolated cytologic descriptions of some of the round cell tumors. [2, 4, 5, 8-10]. Our purpose here is to present the cytologic characteristics of canine. cutaneous round cell tumors, including those on the external genitalia, and to. encourage the use of cytology in the diagnosis of these tumors.
The thyroid gland is influenced by hormones produced by two other organs: 1  The pituitary gland, located at the base of the brain, produces thyroid stimulating hormone (TSH). 2  The hypothalamus, a small part of the brain above the pituitary, produces thyrotropin releasing hormone (TRH).
In the inner ear, glutamate is released by hair cells and received by the dendrites of afferent spiral ganglion neurons through two different types of neurotransmitter receptors, non-NMDA and NMDA receptors[1]. These two receptors work as a dual receptor system.