[Cocaine-induced vasculitis and mimics of vasculitis].

Ruffer, Nikolas; Krusche, Martin; Holl-Ulrich, Konstanze; Kötter, Ina; Lötscher, Fabian (2023). [Cocaine-induced vasculitis and mimics of vasculitis]. Zeitschrift für Rheumatologie, 82(7), pp. 606-614. Springer-Medizin-Verlag 10.1007/s00393-022-01217-1

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Cocaine is a psychotropic tropane alkaloid and stimulant drug. Nasal insufflation of cocaine powder is a common route of administration. In Germany, cocaine is frequently adulterated with levamisole, an anthelminthic drug with immunomodulatory effects. Both substances are linked to various autoimmune conditions. Cocaine-induced midline destructive lesions cause a progressive destruction of osteocartilaginous structures within the upper respiratory tract and can mimic localized granulomatosis with polyangiitis. In addition, systemic vasculitis due to cocaine and levamisole has been reported. Differentiation of these conditions from primary vasculitis can be challenging because antineutrophil cytoplasmic antibodies (ANCA) are commonly detected. Early diagnosis of these conditions is crucial as clinical improvement is closely related to drug cessation.

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