Features here are of a relatively typical case of SUFE. Some institutions only perform a flog-leg radiograph in patients between the age of 8 and 14 and they are the view to look at first. In patients of this age, never be satisfied with a single AP view.
These patients need urgent referral to the orthopedic surgeons and need to be on bed rest so that they don't make the slip worse. Surgical treatment is to pin the epiphysis in place (usually without manipulation) and since 10% of cases are bilateral, they often prophylactically pin the contralateral side.