Fig. 2

Histopathology of the left ovary. a Wall of cyst with an ependymal-lined cavity with surrounding glial tissue, in turn flanked by lymphocytes. Squamous epithelium to the right. Hematoxylin and eosin, original magnification × 50. b Broad cavity lined by ependyma, recapitulating a ventricular structure. Lymphocytes present to lower right. Bronchial structures also present. Hematoxylin and eosin, original magnification × 50. c Higher magnification demonstrates close relationship of lymphocytes to glial tissue in the subependymal-like neural structures. Hematoxylin and eosin, original magnification × 100. d Immunohistochemistry for CD8 demonstrates cytotoxic T lymphocytes. CD4-positive T helper cells and CD20-positive B lymphocytes were also present. Original magnification × 100