DALLAS — Pseudotumor formation occurred in 52% of patients who underwent metal-on-metal total hip arthroplasty performed with two different designs of prostheses and later underwent metal artifact reduction sequence MRI or MARS MRI of the hip, a presenter said at the American Association of Hip and Knee Surgeons Annual Meeting.

“So overall prevalence and severity, over half of our patients had a pseudotumor and nearly 40% either had a type 2 or type 3 lesion,” Daniel E. Goltz, BS, said.