Computed tomography of the pelvis (A) revealed a cystic left adnexal mass with an internal focus of fat and high attenuation material suggesting an ovarian teratoma (asterisk). N-methyl-D-aspartate receptor subunit 1 (NR1) immunostain demonstrated primitive neural tubes (B) within teratoma, while neurofilament immunostain showed mature ganglion cells (C). Epstein-Barr virus encoded RNA (EBER) in situ hybridization revealed scattered latent EBV infected cells in mucinous glandular epithelium of the teratoma (D, brown color), an EBV infected NK/T cell lymphoma (E) served as positive control. (For panels B to E, bars = 50 μm).
Xu et al. BMC Neurology 2011 11:149 doi:10.1186/1471-2377-11-149