The present invention relates to an apparatus for performing heat treatment of a bodily cavity in a mammal. The apparatus comprises a catheter intended for insertion into said bodily cavity, an inflatable balloon surrounding a distal end of said catheter in a liquid tight manner which balloon is adapted in use of said apparatus to be inflated and dilated in said bodily cavity, control means operatively connected to said balloon by at least one oscillation lumen and being provided with an oscillation assembly adapted to drive a heat transmitting fluid within said apparatus, and heating means adapted to heat said heat transmitting fluid. Said control means are adapted to control pressure and temperature of said heat transmitting fluid. The heating means have a heat emitting portion and a heat receiving portion which is use of the apparatus are positioned in thermal contact with each other, and which are separable from each other.
