DYSEMBRYOMA
\dˌa͡ɪsɪmbɹɪˈə͡ʊmə], \dˌaɪsɪmbɹɪˈəʊmə], \d_ˌaɪ_s_ɪ_m_b_ɹ_ɪ__ˈəʊ_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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Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.