Probable Role of Oral Contraceptive Pill (OCP) in the Development of Femoral Head Osteonecrosis

Background: Femoral head osteonecrosis is a condition that caused decreased femoral head blood supply. The risk factors which involving in this disease including long time corticosteroid consumption, smoking, alcoholism. In this report, we aim to introduce a case of avascular necrosis of femoral head in a woman with a history of OCP consumption.Case report:A 24 Y/O woman presented with pain in pelvis and both thighs within past 7 months, which radiated to legs and toe tips. 13 months ago, she had a history of OCP consumption for 2 months. After that she had to stop continuing the OCP taking as a result of headache, vertigo and blurred vision; and then her symptoms proved after 7 days treating with prednisone (total dose of 350mg). She developed pain in her legs and disability of doing routines 6 months later.