Options for systemic therapy include hormone therapy, chemotherapy or targeted therapy.

CNN: Recurrent breast cancer

And so, while one might presume that Watson can generate a correct answer for optimal management for the next systemic therapy for someone with progressing advanced lung cancer, at best Watson can reproduce the thought processes of its very limited number of mentors.

FORBES: Is IBM's Watson in Jeopardy? This Oncologist Thinks So!

If the cancer has spread to other parts of the body, treatment for a metastatic recurrence usually involves whole body (systemic) therapy rather than local therapy such as surgery or radiation.

CNN: Recurrent breast cancer