Rat cerebellar slice culture incubated with serum from Patient 3, a neurologically normal individual with mixed mesodermal ovarian sarcoma.

<p><b>Panels A and B</b> demonstrate. extensive accumulation of IgG not only within Purkinje cells (arrow) but also in other neurons within and near the Purkinje cell layer (asterisks). <b>Panels C and D</b>: Purkinje and other neurons exhibiting Cy5 labeling for human IgG do not contain SYTOX green, indicating that IgG uptake had occurred in viable cells. Scale bars = 20μ.