Haglund's syndrome is an abnormality of the bone and soft tissues in the foot. An enlargement of the bony section of the heel (where the Achilles tendon is inserted) triggers this condition. * symptom includes insertional Achilles tendinopathy (IAT), The patient with HS often has a red, irritated, painful heel. And they often complain the enlargement of the posterior heel, which make it more difficult to footwear or sport * Zadek described the Zadek Osteotomy option for the treatment of Haglund's syndrome This operation can change the calcaneus' anatomical length and elevate the distal insertion point of the Achilles tendon \- It is a prospective case series study that will be done in Orthopedics and Traumatology department of Sohag university hospitals on patients suffering from Haglund's syndrome and treated by Zadek osteotomy * This study aims to evaluate short term clinical, radiological and functional outcomes of Zadek osteotomy for treatment of Haglund's syndrome