Secondary Chondrosarcoma Arising from the Proximal Fibula Presenting as Sciatica.

Introduction: Secondary chondrosarcoma is a rare entity arising from a pre-existing cartilaginous lesion. Transformation of an osteochondroma to a chondrosarcoma occurs in <1% of cases. Sciatica is a common problem that can cause significant pain, weakness, and numbness.

K-wire Pull-Out Force After Multiple Redirection Attempts.

Purpose: To evaluate if redirecting a Kirschner wire (K-wire) through the same proximal hole will weaken the pull-out force and to test if multiple redirections will result in a continued stepwise decrease in pull-out force.

Methods: An Instron was used to test the pull-out force of K-wires using the peak initial failure load as a measure of failure of K-wire fixation. K-wires 0.

Fracture of a Carbon Fiber Reinforced Intramedullary Femoral Nail.

Carbon fiber reinforced implants have emerged as an alternative to traditional stainless steel and titanium implants because of the improved visibility on advanced imaging and excellent biomechanical strength. This can be advantageous in patients with concern about fracture healing, tumor recurrence, or additional imaging requirements. However, limited long-term data are available to present complications from the use of these implants.

Use of Magnetic Growing Intramedullary Nails in Compression During Intercalary Allograft Reconstruction.

Traditionally, intercalary allograft reconstruction after tumor resection has had a high rate of complications, particularly nonunion. Plate and intramedullary nail fixation have been used alone and in combination to improve union rates. This study sought to evaluate a new technique that uses a magnetic growing intramedullary nail to compress the osteotomy sites to aid in healing and to answer 2 questions: (1) What is the union rate and the time to union when using magnetic growing intramedullary nails? (2) What complications occur with this technique? Eight patients with 15 osteotomy sites with a minimum follow-up of 14 months were retrospectively reviewed.