mi·cro·sur·ger·y 
(mī′krō-sûrjə-rē)
(mī′krō-sûrjə-rē)n. pl. mi·cro·sur·ger·ies
Surgery on minute body structures or cells performed with the aid of a microscope and other specialized instruments, such as a micromanipulator.
mi′cro·surgi·cal (-jĭ-kəl) adj.