\tˈɛɹətˌɔ͡ɪd tjˈuːmə], \tˈɛɹətˌɔɪd tjˈuːmə], \t_ˈɛ_ɹ_ə_t_ˌɔɪ_d t_j_ˈuː_m_ə]\
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A true neoplasm composed of a number of different types of tissue, none of which is native to the area in which it occurs. It is composed of tissues that are derived from three germinal layers, the endoderm, mesoderm, and ectoderm. They may be solid or cystic and are classified histologically as mature, immature, and malignant. (From Dorland, 27th ed & DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p1642)
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By Stedman, Thomas Lathrop
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Dorsal Root Ganglia
- ganglia located on dorsal roots within vertebral column. ganglion cells are pseudounipolar. single primary bifurcates sending peripheral process to carry sensory information from the periphery and a central branch which relays that spinal cord or brain.