Method and device for treating cancer

A method of treating cancer comprising the steps of

• (a) providing a device having
• a chamber with an inlet and an outlet in fluid communication with an interior of the chamber to enable a fluid containing an activating agent to flow in one direction into the inlet, through the interior of the chamber, and out the outlet, and
• a plurality of tubular passageways within the chamber, said passageways assembled within said interior and configured to be placed in fluid communication with a patient to enable blood from the patient to flow through the passageways in a direction opposite to said one direction of the fluid flow,
• said tubular passageways having an interior wall with a plurality of wells therein having open mouths of predetermined dimensions that enable immune cells and cancer cells in a patient's blood flowing through the passageways to pass through the open mouths and enter the wells,
• said wells including a porous wall with a predetermined pore size that enables the activating agent in the fluid flowing through the interior of the chamber to pass through a well's porous wall and enter said well yet prevents immune cells and cancer cells in a well to flow through said wall into said interior of the chamber,
• (b) establishing between a patient and the device (i) a connection wherein said fluid containing the activating agent flows in said first direction through the interior of the chamber with at least some activating agent passing through the porous walls into the wells and (ii) a connection wherein blood from said patient flows in said second direction through the passageways with immune cells and cancer cells in said patient's blood passing through the open mouths of the wells and entering the wells.