Prevalence of Pseudotumor in Patients After Metal-On-Metal Hip Arthroplasty Evaluated with Metal Ion Analysis and MARS-MRI

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• 作者：Sean A. Sutphen ; DO^a ; ; Lewis H. MacLaughlin ; MD^b ; Adam A. Madsen ; DO^a ; Jackie H. Russell ; RN^c ; Michael A. McShane ; MD^c
• 关键词：pseudotumor ; metal-on-metal ; metal ion levels ; MARS-MRI ; hip arthroplasty
• 刊名：The Journal of Arthroplasty
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：31
• 期：1
• 页码：260-263
• 全文大小：309 K

文摘

The purpose of this study is to quantify the prevalence of pseudotumors in patients with well-functioning and painful metal-on-metal total hip arthroplasty, to characterize the pseudotumor with the use of MARS-MRI, and to assess the relationship between pseudotumors and metal ions. We retrospectively reviewed 102 single surgeon patients. The results showed that 68.6% developed pseudotumor with 60.9% of the asymptomatic group developing pseudotumor. The symptomatic group had a higher proportion of patients with elevated serum cobalt levels (P = 0.035). There was no difference found with elevated metal ions and prevalence of pseudotumor, but elevated cobalt levels were associated with larger pseudotumor size (P = 0.001). The available evidence indicated that most patients that develop pseudotumors are asymptomatic, and that elevated serum cobalt levels may be associated with symptoms and pseudotumor size.