case_images: PMC9720795_01
case_images: Computed tomography scan of right upper extremity revealing an 11.2 cm x 14.2
  cm x 8.8 cm right shoulder mass with osseous erosion of the inferior right
  scapula.
case_images: 10.1177_23247096221141190-fig1.jpg
case_images: PMC9720795_01_10.1177_23247096221141190-fig1.jpg
case_images: fig1-23247096221141190
case_images: Computed tomography (CT) imaging of the right upper extremity as depicted in Figure 1 revealed a large peripherally enhancing mass centered about the right shoulder measuring approximately 11.2 cm x 14.2 cm x 8.8 cm with osseous erosion of the inferior right scapula.
case_images: The low-power view shows a very cellular tumor (Hematoxylin & Eosin
  stain, original magnification x200).
case_images: 10.1177_23247096221141190-fig2.jpg
case_images: PMC9720795_01_10.1177_23247096221141190-fig2.jpg
case_images: fig2-23247096221141190
case_images: The pathology results of the shoulder mass biopsy revealed a high-grade pleomorphic sarcoma with admixed giant cells, favoring an UPS, high-grade Federation Nationale des Centres de Lutte Contre Le Cancer (FNCLCC Grade 3 of 3) as depicted in Figures 2 and 3.
case_images: The high-power view shows malignant tumor cells with large and pleomorphic
  nuclei, a moderate amount of cytoplasm, prominent nucleoli, and some mitotic
  figures (arrow). Hematoxylin & Eosin stain, original magnification
  x400.
case_images: 10.1177_23247096221141190-fig3.jpg
case_images: PMC9720795_01_10.1177_23247096221141190-fig3.jpg
case_images: fig3-23247096221141190
case_images: The pathology results of the shoulder mass biopsy revealed a high-grade pleomorphic sarcoma with admixed giant cells, favoring an UPS, high-grade Federation Nationale des Centres de Lutte Contre Le Cancer (FNCLCC Grade 3 of 3) as depicted in Figures 2 and 3.
case_images: The tumor contains several osteoblastic-like multinucleated giant cells
  (arrows). Hematoxylin & Eosin stain, original magnification x400.
case_images: 10.1177_23247096221141190-fig4.jpg
case_images: PMC9720795_01_10.1177_23247096221141190-fig4.jpg
case_images: fig4-23247096221141190
case_images: Figure 4. Furthermore, tumor necrosis was identified.