The dominant histologic feature of infarction is:
Pathognomonic cytologic change in all infarcts is coagulative (ischaemic) necrosis of the affected area of tissue or organ. 
In cerebral infarcts, however, there is characteristic liquefactive necrosis.

Mohan H. Textbook of pathology. Jaypee Brothers Medical Publishers; 2015. Edition 7. Page 112
Liquefactive necrosis
Coagulative necrosis
Chronic inflammation
Scar tissue