Synonym: “pump bump” (pump = woman’s shoe)
Haglund’s deformity is an enlarged retrocalcaneal bursa.
If the bursa becomes inflamed (bursitis) then the pain and swelling is termed Haglund’s disease.
When a person wears a shoe, compression of the Achilles tendon and adjacent soft tissue between the os calcis and the posterior shoe counter can worsen the pain.
Imaging findings (Stephens, 1994):
(1) superior calcaneal angle > 75 degrees
(2) calcaneal inclination and posterior calcaneal angle > 90 degrees
(3) excessive bone above the upper parallel pitch line
Differential diagnosis:
(1) disorders of the Achilles tendon
(2) calcaneal fracture
(3) rheumatoid arthritis or other autoimmune disease
