Final answer:
A fracture of the femoral neck within the capsule of the hip joint can lead to necrosis, arthritis, and the need for surgical treatment and mobility assistance.
Step-by-step explanation:
A fracture of the femoral neck within the capsule of the hip joint can have several consequences. One possible consequence is necrosis, which is the death of bone and cartilage in the affected area due to a disruption in the blood supply. Another consequence is the development of arthritis, as the injury can cause rough or jagged surfaces in the joint, leading to painful movements. Additionally, surgical treatment is usually required for femoral fractures, and the patient may need mobility assistance for a prolonged period.