Archives of the AFIP -- RadioGraphics

Figure Legend | Panel A | Panel B

Figure 7: Immature craniofacial teratoma in a newborn girl (see Fig 10). Panel A Photomicrograph (original magnification, X400; hematoxylin-eosin stain) demonstrates immature neuronal tissues, features often found in craniofacial teratomas. There are neuronal rosettes and embryonal neural tube structures (*). Panel B Photomicrograph (original magnification, X400; hematoxylin-eosin stain) of another microscopic field in the same mass reveals the characteristic histologic diversity of a well-differentiated teratoma and excludes the possibility of a less complex lesion such as a PNET. In addition to the neural tube differentiation (from ectoderm), this lesion also contains scattered microscopic foci of liver tissue, a derivative of entoderm. There is a large, central region of liver tissue, immediately adjacent to some neural tube structures. Careful pathologic examination did not reveal any mesodermal elements; therefore, the mass is only a bidermal rather than a tridermal teratoma.

Return to: Teratomas