The authors review histologic findings from 50 cases of heel spur surgery for 
chronic plantar fasciitis. Findings include myxoid degeneration with 
fragmentation and degeneration of the plantar fascia and bone marrow vascular 
ectasia. Histologic findings are presented to support the thesis that "plantar 
fasciitis" is a degenerative fasciosis without inflammation, not a fasciitis. 
These findings suggest that treatment regimens such as serial corticosteroid 
injections into the plantar fascia should be reevaluated in the absence of 
inflammation and in light of their potential to induce plantar fascial rupture.