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Home › Body Atlas › Bones › Calcaneal Spur
Bone Foot & Ankle

Calcaneal Spur

osteophytum calcanei

The calcaneal spur is an osteophyte that forms at the plantar fascia and intrinsic muscle origins on the medial calcaneal tuberosity, present in approximately 50 percent of patients with plantar fasciitis but also in 15 to 20 percent of asymptomatic individuals. Its presence does not directly cause plantar heel pain, the inflammation in the adjacent plantar fascia origin and periosteum causes the pain.

Anatomical Data

Structure & Landmarks

Articulations
  • Plantar fascia via entheseal attachment
Landmarks
  • Visible on lateral foot radiograph as a bony projection from the inferior calcaneal surface
  • Located at the plantar fascia medial calcaneal attachment
  • Not palpable directly but the area of attachment is maximally tender in plantar fasciitis
OssificationCalcaneal spurs develop progressively from young adulthood through middle age as cumulative microtrauma stimulates periosteal bone deposition at the enthesis.
Clinical Relevance

Clinical Notes

The plantar calcaneal spur forms from repetitive microtrauma at the plantar fascia and short flexor muscle origins, with calcium deposition along the stressed fibres. Its presence on radiograph has poor correlation with heel pain severity. Many patients have spurs without symptoms and significant plantar fasciitis occurs without visible spurs. Extracorporeal shockwave therapy and plantar fascia stretching treat the enthesopathy regardless of spur presence. Surgical spur excision combined with plantar fasciotomy is occasionally performed for refractory cases.

Pathology

Common Injuries & Conditions

Plantar Fasciitis

Inflammation and degeneration of the plantar fascia origin near the spur, causing heel pain worst with the first steps in the morning.

Spur Fracture

Rarely, a large plantar spur fractures after a fall or impact, causing acute heel pain.

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