Electro Cancer Therapy (ECT), or electro-chemical tumour therapy, is a tumour eradication process during cancer treatment which often allows the dissolution of tumour tissue without surgical intervention or radioactive treatment.

The effect of ECT is summarised as follows: If the tumour tissue has direct current applied through electrodes, the resulting current flow will lead to a chemical change in the tumour cell. The triggered processes cause the development of hydrochloric acid within the cancer cell which will destroy the cell membrane. Because of the different resistance values in comparison to healthy tissue, the current flow is focussed on the tumour alone, and therefore no healthy tissue is destroyed.