In the middle of the 1990 s

the concept of "oligometastasis"was proposed for the first time

which is one of intermediate states in the process of neoplasms metastasis. The oligometastatic state is a relative period with mild biological invasiona

between local primary tumor and widespread metastasis

with limited metastatic foci and organ-specific features. The therapeutic strategies of oligometastatic disease is local therapy

such as radiotherapy

surgery

radiofrequency ablation

etc. And simultaneously

systemic therapy could be taken into consideration. Correct understanding of oligometastasis and its therapeutic strategies may change the traditional concept of treatment of malignant neoplasms

also bring possibility of curable results for some advanced neoplasms patients.