Cystic change on femoral head and neck in neurofbromatosis patient is rare case. Scoliosis is the most common bony lesion. Others are appeared at changes of out feature in long bone shaft. Bone cyst with bone fracture are treated with non operation or external fixation, osteotomy, curettage, partial and complete excision of cyst capsule, steroid injection therapy, bone graft, internal fixation, arthroplasty. We have experienced a case of bone cystic change on femoral head and neck with femoral head fracture and acetabular lesion in neurofibromatosis patient treated with total hip arthroplasty who was acceptable result.