A 20 year old female is complaining about intermittend ventral right sided hip pain. The symptoms are provoked with uncontrolled, quick leg movements during pole dance. Sometimes she has a feeling of giving way of her right hip during standing in end of range extension. There was an incidious onset a month ago during pole dance with the tendency of gradually worsening. No previous history of hip, pelvis or lumbar promblems. There is a family history of early hip osteoarthrosis.
What is her possible diagnosis?