Reactional state in lepromatous leprosy simulating Sweet's syndrome

Area of Science:

• Dermatology
• Immunology
• Pathology

Background:

• Erythema nodosum leprosum (ENL), a Type-2 lepra reaction, is a manifestation of type-III hypersensitivity.
• It typically occurs in lepromatous and borderline lepromatous leprosy cases.
• ENL commonly presents as widespread erythematous, inflamed nodules and papules.

Observation:

• Rare variants of ENL can mimic other dermatological conditions like pemphigus or Sweet's syndrome (SS).
• This report details an unusual case of persistent ENL in a 52-year-old female patient.
• The patient presented with persistent skin lesions suggestive of ENL.

Findings:

• Skin biopsy and subsequent histopathological examination were crucial for diagnosing the persistent ENL.
• Histopathology confirmed the diagnosis, differentiating it from other potential conditions.
• The findings underscore the importance of histopathological analysis in complex ENL cases.

Implications:

• This case expands the understanding of ENL's clinical spectrum and diagnostic challenges.
• It emphasizes the utility of skin biopsy in diagnosing persistent or atypical ENL presentations.
• Accurate diagnosis through histopathology is vital for appropriate patient management and treatment strategies.