Scientists and doctors are predicting that sometime in the near future all surgery could be scarless. By using robots small enough to enter the body through its natural orifices, external incisions can be avoided. The Assembling Reconfigurable Endoluminal Surgical System (ARES) is a robot that is able to assemble itself inside the body of a patient that has swallowed the separate parts. Patients can swallow up to 15 parts, each with its own role to play (image control, communications, structural functions, diagnostics, etc.). The robot would be assembled at the site of surgery and be able to be expelled or disintegrated after the operation is over.
(Source: Singularity Hub)