Primary thoracolumbar intraspinal malignant melanoma: A case report

Figure 1 Computed tomography showing that the spinal canal at thoracic 12 to lumbar 1 had a slightly greater nodular density and an unclear boundary.

Figure 2 Magnetic resonance imaging and enhanced magnetic resonance image. A: Magnetic resonance imaging revealed spindle-shaped swelling in the spinal canal of thoracic 12 to lumbar 1, with a slightly greater signal in T1-weighted imaging and an equal signal in T1-weighted imaging with a clear boundary; B: Enhanced magnetic resonance image showing that the number of foci was significantly greater; C: An abnormal signal was still observed in the spinal canal after surgery, indicating residual tumor tissue.

Figure 3 The mass is generally black-brown and clot-shaped.

Figure 4 The tumor cells have a nest sheet and are rich in pigment, with tumor cell atypia, large nuclei, obvious nucleoli, and visible nuclear division, consistent with malignant melanoma.