A teratoma is a type of tumor that can form in different parts of the body. It contains tissues from various types of cells and can sometimes even develop hair, teeth, or other body parts. Full definition
Importantly, injected to nude rat, cells form teratoma with derivatives of the three germ layers. (istem.eu)
This procedure minimized the danger of teratoma formation by non-differentiated cells. (journals.plos.org)
The new iPS cells passed the standard tests for pluripotency: They formed tumors called teratomas when injected into immunocompromised mice, and they could differentiate into cells from the three main tissue types in the body, including neurons, muscle and gut epithelium. (sciencedaily.com)