Category: M

An apparatus by which extremely minute pipettes or needles can be manipulated under a microscope for microdissection, microinjection, or microsurgery.  

The development of minute stones (tiny calcium deposits resembling grit or gravel) within tissues. Microlithiasis is found in the gallbladder in some patients with otherwise unexplained pancreatitis.  

A tool used in ophthalmology to remove a precisely measured depth of cornea.  

Invasion of the tissue adjacent to a carcinoma in situ. The infiltration of cancerous cells into the healthy tissue neighboring the tumor. It can solely be identified through the microscopic scrutiny of a tissue sample. This phase marks a transition between carcinoma in situ and the invasive stage.  

The needle and sheath through which a guidewire and peripherally inserted central catheter are placed. Use of this instrument decreases the risk of vessel puncture and allows the person doing the procedure to use a smaller needle to access the vein and then enlarge the opening with a dilator.  

Injection of substances into cells or minute vessels by means of a micropipette.  

Determination of the presence and distribution of inorganic matter in tissues by subjecting a microscopic section of tissue to high temperatures, which destroys organic matter and leaves mineral matter as ash.  

Microscopic bleeding into the anterior chamber of the eye, visible during slit lamp examination.  

A microunit of electrical resistance; one-millionth of an ohm.  

A small, malformed gyrus of the brain.