For a large class of piecewise expanding C1,1 maps of the interval we prove the Lasota-Yorke inequality with a constant smaller than the previously known 2/ inf |τ ′|. Consequently, the stability results of Keller-Liverani [7] apply to this class and in particular to maps with periodic turning points. One of the applications is the stability of acim’s for a class of W-shaped maps. Another appli...

Background: Excision arthroplasty of the hip was first documented in surgical practice over a century ago. However, it was made popular in 1943 by Gathorne Girdlestone who used the technique for the treatment for septic arthritis of the hip.1 Thus his name has been synonymous with the procedure, which is currently used to address problems arising from failed hip surgery including peri-prostheti...

LEARNING OBJECTIVES After studying this article, the participant should be able to: 1. Understand the pathomechanical and biochemical basis for thumb trapeziometacarpal joint degeneration. 2. Diagnose and grade trapeziometacarpal joint disease based on presentation, physical examination (including provocative testing), and radiographic evidence. 3. Understand the principles of ligament reconstr...

Six patients with severe haemophilic arthropathy of the elbow have been treated by limited excision arthroplasty using a sheet of silicone rubber as an interposition membrane. There were no complications. The symptoms and signs before and after operation have been assessed using the grading system advocated recently by the World Federation of Haemophilia. In all cases there was relief of pain a...

We report the case of a recurrent phosphaturic mesenchymal tumor (PHT) of the right acetabulum in a 47-year-old man with a long history of hip pain. After primary excision of the PHT, successful remission was expected due to normal phosphate levels. Over a long period, a recurrence led to destruction of the acetabulum and loosening of the back plate of the hip prosthesis. One-year follow-up aft...

The Girdlestone procedure is an excision arthroplasty of the hip. Rarely used nowadays, it was required in a young patient following discovery of avascular necrosis of the femoral head as a result of septic emboli from infective endocarditis in an intravenous drug user. This procedure was deemed necessary based on poor cardiac function and anaesthetic risk. During this case report we will discu...

Sixty-five total hip arthroplastics were reinserted after sepsis around the hip, positive cultures being obtained from fifty-six. Although 65 per cent of patients still have their implant in position, only sixteen of sixty-five (25 per cent) show an excellent or good result on a Harris rating. Twenty-three of sixty-five (35 per cent) subsequently required an excision arthroplasty. The indicatio...

Excision arthroplasty of the interphalangeal joint was used as an alternative to digit amputation for comminuted fractures of the phalangeal bones in two dogs. Both patients had return of pain-free use of the affected limb, even though both weight-bearing digits were involved in one case. This type of surgery might prove to be superior to the more invasive digit amputation, salvaging the digits...

Lipoma arborescens is a chronic, slow-growing, intra-articular lesion of benign nature, characterized by villous proliferation the synovium, with replacement sub synovial connective tissue mature fat cells. We present case report 44-year-old male patient complaints right hip pain for 4 years. Patient presented pain, limp and restriction range motion at hip. Plain radiographs followed MRI scans ...