After fixation, the central nervous system (CNS) was sectioned in 4-5mm transverse sections. Transverse sections taken from the cervical, thoracic and lumbar spinal cord, medulla oblongata, pons, ...
Microscopically, the tumor elements were characterized by large polygonal cells with vesicular nuclei, prominent nucleoli and amphophilic cytoplasm ... incluíram estruturas ductais com padrões ...