Apparatus and methods for treating a target tissue by delivering a fluid
at a defined temperature to a patient's body. An apparatus of the
invention includes a fluid delivery unit for delivering fluid in at least
close proximity to the target tissue, an aspiration unit for withdrawing
the fluid, and a fluid source unit for providing the fluid at the defined
temperature. A method of the invention includes forming a void in at
least close proximity to the target tissue, and circulating a preheated
fluid through the void, wherein the target tissue undergoes adjustment
from body temperature to a treatment temperature due to heat exchange
between the fluid and the target tissue.