Disseminated sporotrichosis presenting with granulomatous inflammatory multiple mononeuropathies.

We describe a case of sporotrichosis that disseminated to involve multiple nerves after initiation of immunosuppressive therapy and then precipitously worsened after withdrawal of therapy. This case illustrates that multiple mononeuropathies are not always caused by vasculitis, and a correct pathological diagnosis should be established before treatment. Based on clinical and pathological features, the mechanism of neuropathy may have been due to either direct nerve infection or a bystander effect of inflammatory/immune damage or, perhaps more likely, to both mechanisms.