Clear cell sarcoma in unusual sites mimicking metastatic melanoma

Figure 3 Radiology and pathology of the thoracic paraspinal mass in Case 2. A: Magnetic resonance imaging of the tumor showed an enhancing thoracic spine mass involving the paraspinal soft tissues; B: Sections of the mass showed fascicles and nests of spindle cells (HE, × 50); C, D: Neoplastic cells displayed melanin pigments (HE, × 400) and positivity for Human Melanoma Black-45 by immunohistochemistry (× 400). HE: Hematoxylin and eosin.