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A Mixed tumor is a tumor that derives from multiple tissue types.
For example, a "Chondroid syringoma" is a cutaneous condition characterized histologically by nests of cuboidal or polygonal epithelial cells in the dermis.:667 There are two types: one derived from a single germ cell layer that differentiates into more than one cell type, and one derived from more than one germ cell layer (totipotent cells).
- James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0.
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