Figure 3

A 76-year-old male with PSM of extramedullary origin at L2-3. MRI shows a slightly hyperintense mass on sagittal T1W image (a) and hypointense on sagittal T2W image (b). Hematoxylin and eosin staining shows a highly cellular malignant tumor with dense deposition of melanin granules (200×) (c) and immunohistochemical studies showed positivity for HMB-45 (200×) (d).