Vasculitic neuropathy presenting as Churg-Strauss paraneoplastic syndrome: a rare association.

Churg-Strauss syndrome (CSS) is a rare necrotizing vasculitis, with incidence of 2.4 cases per million. It is composed of four of six criteria: asthma, eosinophilia greater than 10%, neuropathy, pulmonary infiltrate, sinus disease and a biopsy containing eosinophilic infiltrate. Peripheral nerve system (PNS) compromise occurs around 75% of the cases and occasionally CSS may be of paraneoplastic origin. We describe a rare case of paraneoplastic CSS associated with breast cancer, presented as severe peripheral polyneuropathy.