Table 3.

Eichenholtz Classification—Temporal staging of CK based on the pathophysiological progression of the disease

Stage	Radiographic findings	Clinical findings
0 (prodromal)	Normal	Swelling, erythema, warmth
I (development)	Osteopenia, joint subluxation, dislocation	Swelling, erythema, warmth, ligamentous laxity
II (coalescence)	Absorption of debris, sclerosis, fusion of larger fragments	Decreased warmth, decreased swelling, decreased erythema
III (reconstruction)	Deformity consolidation, fibrous ankyloses, rounding and smoothing of bone fragments	Fixed deformity, absence of warmth, swelling, erythema