Gluteal muscle fatty atrophy is not associated with elevated blood metal ions or pseudotumors in patients with a unilateral metal-on-metal hip replacement.

No other statistically significant differences in median WB Cr and WB Co levels were observed in relation to grade of atrophy in other muscle groups (all p > 0.05). There was a borderline significant (p = 0.05) but relatively small difference in the distribution of grade of atrophy in g. maximus across different PT findings ( Figure 4 ).

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