Microsurgery

Microsurgery was a form of surgery requiring an operating microscope.

In 2367, Beverly Crusher said that without the interactive signals of the Borg implants that connected Jean-Luc Picard to the Borg Collective, it would only be a matter of microsurgery to free him. 

In 2378, Tuvok listed performing microsurgery as one of The Doctor's skills that set him apart from being akin to a replicator, as Ardon Broht asserted. 

In 2379 in an alternate timeline, Doctor Kes performed microsurgery on Captain Chakotay's elbow a few weeks prior to the onset of the morilogium.