This is a method for special indications like liver or lung metastases. Under imaging control a fine needle is inserted directly into the tumor. At the end of this perforated needle, under mild pressure, steam is released, which helps to distribute the heat of the needle tip evenly into the tumor, causing immediate tumor coagulation. HFTT is very effective and can prevent liver- and lung surgery. It can also be utilized with other forms of cancer, for instance isolated lymph node metastases, or isolated lumps in the breast, etc.