08 June 2017 : Case report
Levamisole-Induced Leukocytoclastic Vasculitis with Negative Serology in a Cocaine User
Patient complains / malpractice, Unexpected drug reaction , Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)Mashal Salehi1ABCDEFG*, Michael P. Morgan1ABEG, Abigail Gabriel1BDG
Am J Case Rep 2017; 18:641-643
BACKGROUND: Levamisole is a common adulterant of cocaine. It can cause agranulocytosis and cutaneous vasculitis that can possibly lead to cutaneous necrosis. In all reported cases of levamisole-induced vasculitis, it has been described as a clinical syndrome characterized by a constellation of typical clinical features and a positive serum serology for ANCA levels, especially very high-titer p-ANCA levels, in the background of cocaine abuse. However, patients may have a negative serology and here, we present the first such case.
CASE REPORT: A 58-year-old African American man with a history of polysubstance abuse, 4 days after last cocaine use, presented with sudden onset of painful pruritic rash and polyarthralgias. He was found to have normal vital signs, with bilateral tender knees and erythematous-purplish maculopapular lesions involving the abdomen and the left thigh. Laboratory work-up was significant for elevated CRP, negative c-ANCA, p-ANCA ANA, and RA levels, and a positive urine toxicology for cocaine. Urine analysis by high-performance liquid chromatography was positive for levamisole. Ultimately, a final diagnosis was made by skin biopsy, which revealed findings suggestive of leukocytoclastic vasculitis.
CONCLUSIONS: Cutaneous leukocytoclastic vasculitis can be caused by levamisole, which is used as an adulterant in cocaine. Most cases are associated with positive ANCA levels; however, a negative serology is also a possibility.
Keywords: Cocaine, Levamisole, Vasculitis, Leukocytoclastic, Cutaneous
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