Anti-Yo Associated Paraneoplastic Cerebellar Degeneration in Ovarian Cancer: A Rare Case Report

rare neurological complication in cancer, characterized by the rapid development of cerebellar ataxia resulting from tumor-induced autoimmunity against cerebellar Purkinje cells. It is mostly seen in gynecological cancers, breast cancer, and small cell lung cancer.1 AntiYo antibody, also known as anti-Purkinje cell cytoplasmic antibody type-1 is highly specific and the most frequently found antibody in patients with PCD. Other antibodies associated with PCD are anti-Hu, antiTr, anti-Ri, and anti-mGluR1. However, no antibodies are identified in nearly 40% of PCD patients.2-4 PCD occurs in about 0.2% of patients with malignant tumors and is characterized by cerebellar symptoms such as ataxia, vertigo, and dysarthria.5 Here, we present a case of anti-Yo-associated PCD in an ovarian cancer patient.