Abstract
Background: Leprosy by definition is a chronic granulomatous infection of the skin and superficial nerves in the skin caused by Mycobacterium leprae and Mycobacterium lepromatosis. [1] It most commonly involves the nose, eyes, throat, and sometimes the testicles. The bacilli are most frequently transmitted via droplets, from the nose during close contact with untreated cases of leprosy. Leprosy was first mentioned in 700BC. Leprosy is common in tropical and subtropical Asia, some Pacific countries, Africa, and South America [2]. It is not known how leprosy is transmitted. Although skin lesions and nerve thickening manifest together, they also appear as separate entities. This study aims to find out the frequently thickened nerves in different spectrums of Hansen’s disease.
 Objectives: To determine the frequently thickened nerves in different spectrums of Hansen’s disease.
 Methods: This descriptive study was conducted in Chettinad Hospital and the Research Institute from June 2021 to August 2021. The patients were biopsy-proven Hansen's disease in a different spectrum of the disease, nerve thickening was obtained using palpation method. The Sample size was small due to the prevailing covid situation at the period during which the study was conducted.
 Results: The data collected from the examination of the different spectrum of disease, the pattern of frequently thickened nerves were evaluated. A total number of 30 patients were examined by palpation method among which 10 patients showed ulnar nerve thickening,7 patients showed greater auricular nerve thickening, 4 patients showed radial cutaneous nerve thickening, 9 patients showed sural nerve thickening.
 Conclusion: In our study, the most common thickened nerve was the ulnar nerve, secondary to that was the sural nerve. This study concludes the only examination done by palpation method, further diagnostic studies might increase the accuracy and specificity of the above-collected data.
Highlights
Hansen’s disease is a chronic granulomatous infection caused by slowonset and late-maturing bacteria called Mycobacterium leprae and Mycobacterium lepromatosis
This study aims to find out the frequently thickened nerves in different spectrums of Hansen’s disease
The data collected from the examination of the different spectrum of disease, the pattern of frequently thickened nerves were evaluated
Summary
Hansen’s disease ( known as leprosy) is a chronic granulomatous infection caused by slowonset and late-maturing bacteria called Mycobacterium leprae and Mycobacterium lepromatosis. It mostly affects the nerves, skin, eyes, and lining of the nasal mucosa and sometimes the testicles [1]. Leprosy is common in tropical and subtropical Asia, some Pacific countries, Africa, and South America [2] It is not known how leprosy is transmitted. This study aims to find out the frequently thickened nerves in different spectrums of Hansen’s disease. Objectives: To determine the frequently thickened nerves in different spectrums of Hansen’s disease. A total number of 30 patients were examined by palpation method among which 10 patients showed ulnar nerve thickening, patients showed greater auricular nerve thickening, 4 patients showed radial cutaneous nerve thickening, 9 patients
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