| Case 142 | Surgical Pathology Case |
| CLINICAL INFORMATION | ||
| 19 year-old male, presented to the emergency room with lower extremity weakness. A paraspinal mass was identified. | ||
| GROSS DESCRIPTION | ||
| 14.2×9.4×4.6cm lobulated, tan, friable mass with involvement of adjacent skeletal muscle. The underlying bone was free of infiltration. | ||
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| HE, 4× | HE, 10× | |
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| HE, 10× | HE, 20× | |
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| HE, 20× | HE, 20× | |
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| HE, 20× | HE, 40× | |
 |  | |
| HE, 40× | HE, 40× | |
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| HE, 40× |
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| Source: PIP07-28 Photo: Zenggang Pan Discussion: Zenggang Pan | ||