Femoral neck fracture of three weeks old in a young adult should be best treated by one of the following -
Up to 3 weeks, treatment of choice for fracture femoral neck in a young patient is closed reduction and internal fixation by multiple screws.
Total hip replacement
Reduction of fracture and femoral osteotomy with head
Prosthetic replacement of femoral head
Reduction of fracture and multiple pin or screw fixation