DRESS syndrome due to first-line antitubercular therapy - A diagnostic imbroglio!
Abstract
Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome after the use of first-line antitubercular drugs (ATDs) is rare and literature regarding DRESS syndrome due to ATDs is scarce in children. We report a young boy with tuberculosis who developed DRESS syndrome after exposure to isoniazid. A 9-year-old boy, diagnosed clinically as pulmonary tuberculosis, presented with fever, fast breathing, maculopapular rash, and one episode of gross hematuria. He had been on 4-drug ATD therapy (isoniazid, rifampicin, ethambutol, and pyrazinamide) for the past 4 weeks. In view of multiorgan involvement and absence of a microbiological diagnosis of tuberculosis, vasculitis was considered and he was treated with steroids. As the child recovered, both corticosteroids and ATD therapy were stopped. At 6 months of follow-up, he was presented with pneumonia. Microbiological diagnosis of tuberculosis was made and 4-drug ATD therapy was reinitiated. After 15 days, he again developed a high-grade fever and rash. On evaluation, isoniazid-induced DRESS syndrome was diagnosed. Subsequently, he received a modified regimen of ethambutol, pyrazinamide, levofloxacin, and linezolid. DRESS syndrome did not recur on these ATDs and the child became asymptomatic. Linezolid was stopped after 3 months of therapy and ethambutol, pyrazinamide, and levofloxacin are being continued. Currently, he has completed 15 months of modified ATD therapy. As a high index of suspicion is required for early…
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