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Borderline tuberculoid leprosy mimicking sarcoidosis: A case report
1Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital Beijing Key Laboratory for Research on Prevention and Treatment of Tropical Diseases (BZ0086), Capital Medical University, Beijing, China Pacific Institute of Medical Sciences, Bothell, Washington.
Diagnosing borderline tuberculoid (BT) leprosy can be challenging due to varied presentations. Advanced molecular and serological tests, such as real-time PCR and antibody detection for Mycobacterium leprae, aid in accurate diagnosis and treatment.
Area of Science:
- Medical Microbiology
- Immunology
- Dermatology
Background:
- Leprosy, caused by Mycobacterium leprae, is a chronic granulomatous disease with diverse clinical and immunological manifestations.
- Borderline tuberculoid (BT) leprosy presents unique diagnostic challenges, often mimicking other granulomatous conditions like sarcoidosis.
Observation:
- A case of a woman with asymmetric skin lesions on her hip and lower limbs, initially misdiagnosed as sarcoidosis.
- Histopathology revealed noncaseating granulomas, a feature common to both sarcoidosis and BT leprosy.
Findings:
- Real-time PCR for Mycobacterium leprae DNA and serological tests for M. leprae antibodies facilitated accurate BT leprosy diagnosis.
- Multidrug therapy for 6 months resulted in significant improvement of skin lesions.
Implications:
- Real-time PCR and antibody detection are valuable auxiliary methods for diagnosing BT leprosy.
- Early and accurate diagnosis is crucial for effective treatment and management of leprosy patients.
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