Background: Valgus deformity (more than 10°valgus on anatomical measurement) is seen in about 10% of patients undergoing total knee arthroplasty (TKA). Valgus deformity is a challenge for the surgeons both for gap balancing and constraint choice. Objectives: The aim of this study was to describe a surgical technique to perform TKA in valgus knee. Patients and Methods: We retrospectively reviewed 32 primary TKA in 27 patients (25 females and 2 males), with valgus knee deformity performed since 2006 to 2014. All procedures have been done by the senior author. In the balancing stage of each procedure, the iliotibial band has been released completely in the first step, and then step by step pie crusting of other lateral structures has been done as needed. Preoperative and postoperative data were obtained retrospectively through chart review and review of radiographs. All patients were clinically examined by the senior author. Preoperative and postoperative knee society scores (KSSs) and functional knee society score (functional KSS) were obtained accordingly. Results: The patients had an average age of 68 years (range, 52 -83 years) with an average postoperative follow-up period of 47.5 months (range, 12 -100 months). The average KSS improved significantly postoperatively from 42 (range, 20 -69) to 90 (range, 67 -99) (P < 0.0001). The average functional KSS improved significantly (P < 0.0001) from 51.4 (range, 35 -70) to 85.5 (range, 45 -100) during follow-up. An average preoperative range of motion also improved by 15.6 degrees during the last follow-up visit (P < 0.001). We had no complication in our patients. Conclusions:The results of our study show that complete release of the iliotibial band and step by step pie-crusting of other lateral structures correct valgus deformities in a safe and simple manner with high success rate and less constrained prosthesis.

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Introduction: Brucellosis is a zoonotic infectious disease with worldwide distribution, especially in the south and central American countries, the Middle-East and the Mediterranean areas. Knee prosthesis infection due to Brucella spp. is very rare with the first case reported in 1991 and the ninth case reported in 2010. Case Presentation: Here is reported a case of a 68-year-old female patient, referring to Shafa Orthopedic hospital, Tehran, Iran, complaining about a discharge from right total knee arthroplasty. All of the knee joint aspirations and laboratory tests were negative for infection. Initially, no clear reason was found for this painful operated knee and it was decided to revise it; however, intraoperative samples were positive for Brucella melitensis. Unfortunately, serum indicators of Brucellosis (Wright, Coombs Wright and 2-mercaptoethanol (2ME) tests) had not been checked in the preoperative evaluations. After six months of antibiotic therapy for brucellosis, a second stage revision surgery was performed successfully. Conclusions: Prosthetic infection by Brucella species is very uncommon, this is the tenth case of total knee prosthesis infection with Brucella spp. reported in the literature but all orthopedic surgeons, especially those who work in the endemic areas, should evaluate a suspected joint for brucellosis.

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