case_images: PMC6404045_01
case_images: MRI of the hip region with metal artifact reduction protocol. A coronal STIR
  sequence image showing 7.7 cm x 5 cm hyper-intense mass adjacent to the
  greater trochanter of left femur.
case_images: 10.1177_2050313X19833506-fig1.jpg
case_images: PMC6404045_01_10.1177_2050313X19833506-fig1.jpg
case_images: fig1-2050313X19833506
case_images: Repeat MRI of hip region with metal artifact reduction protocol revealed a 7.7 cm x 5.0 cm intramuscular mass abutting left hip prosthesis adjacent to greater trochanter (Figure 1).
case_images: Muscle biopsy with H&E stain (40x) showing plasma cell neoplasm (white
  arrow).
case_images: 10.1177_2050313X19833506-fig2.jpg
case_images: PMC6404045_01_10.1177_2050313X19833506-fig2.jpg
case_images: fig2-2050313X19833506
case_images: Immunohistochemistry positive for CD138 confirmed the presence of plasma cells (Figure 2).
case_images: Contrast-enhanced axial T1-weighted MRI image of hip region showing a
  reduction is tumor mass (3.3 cm x 2.3 cm).
case_images: 10.1177_2050313X19833506-fig3.jpg
case_images: PMC6404045_01_10.1177_2050313X19833506-fig3.jpg
case_images: fig3-2050313X19833506
case_images: After 4 weeks, his leg weakness improved along with significant reduction in tumor mass (3.3 cm x 2 cm) on follow-up MRI (Figure 3).