Erythema nodosum leprosum presenting as sweet's syndrome-like reaction in a borderline lepromatous leprosy patient.

Erythema nodosum leprosum (ENL) is characterized by tender erythematous nodules, accompanied by fever, malaise, arthralgia, and systemic complications. Atypical clinical manifestations have been reported such as pustular, bullous, ulceration; livedo reticularis; erythema multiforme-like reaction; and Sweet's syndrome (SS)-like presentation. We reported a case of ENL reaction presenting as SS-like reaction in a borderline lepromatous leprosy patient.