Teratoma formation in immunodeficiency mice by targeted cells.

<p>H&E staining of teratomas was performed. Derivatives of all three germ layers were observed in the endoderm: (<b>a</b>) gallbladder, (<b>b</b>) intestinal-like epithelium, and (<b>c</b>) respiratory epithelium; in the mesoderm, (<b>d</b>) cartilage and (<b>e</b>) muscle; and in the ectoderm, (<b>f</b>) squamous epithelium. Bar = 200 µm.