Characteristics of primary giant cell tumor in soft tissue on magnetic resonance imaging: A case report

Figure 3 Pathological features of the tumor. A: The relatively clear boundary (arrows) of the tumor; B: The tumor had invaded neighboring muscles (arrows) on one side; C: Hemosiderin-containing cells (arrows) indicated the tumor with interstitial hemorrhage; D: The tumor had many multinucleated giant cells (arrows) surrounded by spindle cells; E: Multinuclear cells showed strongly positive CD68 (arrows); F: The tumor cells showed negative CD34 but were reactive to vascular endothelial cells (arrows) in the stroma.