Case of juxta-articular osteoid osteoma of calcaneus mimicking arthritis.

Juxta-articular osteoid osteoma is a rare disorder that is difficult to correctly diagnose at an early stage. We report a case of osteoid osteoma in the calcaneus that arose near to the talocalcaneal joint. An 18-year-old female presented with symptoms of joint swelling and effusion similar to those of monoarthritis.

Clinical and radiological results of GSB III total elbow arthroplasty in patients with rheumatoid arthritis.

Total elbow arthroplasty (TEA) with the GSB III prosthesis was performed in 32 patients (36 elbows) with rheumatoid arthritis between 2001 and 2009. At final follow-up, 31 patients (35 TEAs) were available for clinical and radiological evaluation. The mean follow-up period was 6.

Increase in range of knee motion to obtain floor sitting after high tibial osteotomy for osteoarthritis.

In order to obtain better range of motion in knees with osteoarthritis, medial and lateral parapatellar retinaculo-capsular release operations were performed at the time of high tibial osteotomy, with fixation using dual plating on medial compartmental knee osteoarthritis (29 knees) or spontaneous osteonecrosis of the medial femoral condyle (15 knees). At removal of the blade plate, 1 to 2 years after the initial osteotomy, the same release procedures were performed together with resection of adhesive soft tissue and resection of osteophytes, which were obstacles to full flexion. A grading system (Grade 0-3) was proposed to evaluate the duration (min) of formal floor sitting.

Use of joint fluid analysis for determining cartilage damage in osteonecrosis of the knee.

Objective: To assess the value of joint fluid analysis for determining cartilage degradation and prognosis in spontaneous osteonecrosis (ON) of the knee.

Methods: Synovial fluid was obtained from 30 knees with spontaneous ON (26 medial femoral condyles, 4 medial tibial plateaus) as well as from 50 knees with medial compartmental osteoarthritis (OA) as a control. Levels of chondroitin 6-sulfate (C6S), C4S, and hyaluronic acid were measured with high-performance liquid chromatography.