Lacunar infarcts are small deep infarcts with a maximum diameter of 1.5 cm and a volume of 0.2-3.4 cm3.The penetrating vessels that feed lacunar infarcts have a diameter of 100-400 µm. Some deep infarcts whose diameters exceed 1.5 cm have been called "giant lacunae" or "super lacunae." However, these are generally distinct in etiology and presentation from typical lacunae. An embolus in the trunk of the middle cerebral artery often causes these larger lacunar infarcts, simultaneously occluding several of the lenticulostriate perforating vessels.