Microscopic Polyangitis Masquerading as Guillain-Barre Syndrome: A Renal Cell Carcinoma Paraneoplasm

Microscopic polyangiitis (MPA), a rare systemic vasculitis and a subset of ANCA associated Vasculitis (AAVC), can manifest with neurological symptoms mimicking Guillain-Barre Syndrome (GBS). We present a unique case where MPA, initially misdiagnosed as GBS, was later revealed as a manifestation of paraneoplastic syndrome secondary to renal cell carcinoma (RCC).