case_images: PMC11828635_01
case_images: PET/CT image showed increased FDG uptake in the right S2 nerve root.
case_images: 10-1055-s-0044-1791694-i2470002-1.jpg
case_images: PMC11828635_01_10-1055-s-0044-1791694-i2470002-1.jpg
case_images: FI2470002-1
case_images: PET/CT showed a paravertebral soft tissue mass along the S2 spinal nerve with a strong FDG uptake (maximum standardized uptake value [SUVmax] 9.2) ( Fig. 1 ), and a nodule with increased FDG uptake in the right lobe of the liver ( Fig. 2 ).
case_images: Hematoxylin and Eosin stained slide showing expansile, cell dense proliferation of neoplastic spindloid cells interspersed with neoplastic pigmented cells (200 magnification).
case_images: 10-1055-s-0044-1791694-i2470002-3.jpg
case_images: PMC11828635_01_10-1055-s-0044-1791694-i2470002-3.jpg
case_images: FI2470002-3
case_images: Pathological examination revealed spindle and epithelioid cells arranged in interlacing fascicles and nests with accumulation of melanin in neoplastic cells and associated melanin containing macrophages ( Fig. 3 ).