Severe metallosis following catastrophic failure of total shoulder arthroplasty - a case report.

Metallosis is an unusual but consequential complication arising from orthopedic hardware implantation, characterized by the deposition of metallic particles in the periprosthetic soft tissues. The incidence of metallosis associated with shoulder arthroplasties is exceptionally rare since the shoulder is not a weight-bearing joint, making it less susceptible to mechanical wear and, consequently, to conditions like particle disease and metallosis. Nevertheless, anomalous metal-on-metal interactions can develop in total shoulder arthroplasties if the polyethylene component fails due to wear, fracture, or dissociation.

CT false-profile view of the hip: a reproducible method of measuring anterior acetabular coverage using volume CT data.

Objective: To devise a simple, reproducible method of using CT data to measure anterior acetabular coverage that results in values analogous to metrics derived from false-profile radiographs.

Materials And Methods: Volume CT images were used to generate simulated false-profile radiographs and cross-sectional false-profile views by angling a multiplanar reformat 115° through the affected acetabulum relative to a line tangential to the posterior margin of the ischial tuberosities. The anterolateral margin of the acetabulum was localized on the CT false-profile view corresponding with the cranial opening of the acetabular roof.

In-office magnetic resonance imaging to monitor responses to therapy in rheumatoid arthritis.

Low-field extremity magnetic resonance imaging (MRI) has been developed as an alternative method for detecting inflammatory changes and structural damage associated with rheumatoid arthritis (RA). Studies have shown that extremity MRI is able to predict future joint damage in patients with early RA and is more sensitive than conventional radiography at detecting joint erosions. This report uses four different cases to illustrate how extremity MRI can be used to monitor disease activity and inform treatment decisions during the management of RA in the routine clinical practice setting.

Comparison of in-office magnetic resonance imaging versus conventional radiography in detecting changes in erosions after one year of infliximab therapy in patients with rheumatoid arthritis.

The objective of this study was to compare standard hand radiographs with in-office 0.2 T magnetic resonance imaging (MRI) in monitoring response to therapy in patients with rheumatoid arthritis (RA) who were receiving infliximab, to evaluate the frequency and location of erosions, and to determine if there were differences in outcome based on disease duration at baseline. Patients who satisfied the American College of Rheumatology criteria for RA and were receiving infliximab therapy were evaluated with a baseline and 1-year follow-up MRI.