Paraneoplastic neurological syndromes (PNS) are well established entities associated with onconeural antibodies. Paraneoplastic parkinsonism is a highly under narrated presentation of PNS. Rapid progression of typical or atypical parkinsonism with red flags like multiaxial involvement, complete gaze palsy and a clinico-radiological mismatch should prompt a clinician to suspect secondary etiologies like infection, metabolic, vascular, metastatic and paraneoplastic causes. We describe a patient with rapidly progressive parkinsonism. Diagnosis of Breast carcinoma associated ANNA-2/ Anti Ri mediated PSP like phenotype was made in this patient based upon clinical examination and investigations. We also present a review of literature on paraneoplastic parkinsonism in this manuscript.
Keywords: Anti Ri antibody; Breast carcinoma; Paraneoplastic neurological syndromes; Parkinsonism; Progressive Supranuclear palsy.
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