have an immunological basis attended by fibroblastic
reaction.
Considered to be of prolonged duration. (months to
years) and commonly follows acute inflammation but
may start by it self especially when causative
organisms are of low grade virulence or the basis of the
injury is an antigen-antibody reaction e.g Rheumatic
fever & rheumatoid arthritis.
, Characterised by:
1) Continued active inflammation.
2) Tissue destruction.
3) Attempts of tissue repair.
All the above characteristics happen simultaneously.
Often attended by presence of granulation tissue and
fibrosis.