Postural Stability and Ankle Mobility in Haglund Syndrome

Inclusion Criteria: * For patient group: * Patient referred from orthopedic surgeon with diagnoses as Haglund syndrome according to the following signs and symptoms * Calcaneal prominence diagnosed on lateral weight bearing radiograph with bony prominence superior to parallel pitch lines or posterior calcaneal angle greater than 75 degrees * Pain medially at insertion of tendo-achilles * Palpation of hard, bony prominence * Pain upon rising out of bed * Both unilateral and bilateral cases, and in consideration of dealing with bilateral cases the tested limb will be the most painful limb. * Age of 25-56 years * Both males and females. * BMI of (18.5 to 24.9) For control group: Healthy volunteers of matched age, sex and body mass index without any musculoskeletal complaints of the lower limbs and will be included in the control group in this study . Exclusion Criteria: * Musculoskeletal disorders except Haglund syndrome * cognitive disorder, visual impairment that affected their daily living and any further medical condition that would prohibit them from participating safely in the chosen balance measures * sensory loss at foot or ankle and with a systemic inflammatory disease, such as diabetes mellitus, peripheral neuropathy, rheumatoid arthritis and ankylosing spondylitis, who had undergone corticosteroid injections or physical therapy in the last three months * Patients with vestibular or neurological disorders * Any other cause of posterior heel pain.