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Perineural inflammatory infiltrate
Lymphohidtiocytic:
Leshmaniasis: amastogotes within macrophages.
Parvovirus B19:
Granulomatous:
Tuberculoid leprosy: nerves can be fragmented and eroded.
Boderline leprosy: acid-fast bacilli are scant; nerves can be eroded.
Mycobacteriosis (non-tuberculous)
Lymphoplasmocytic:
Secondary syphilis: endothelial swelling; epidermal hyperplasia.
Scleroderma
Eosinophylia/myalgia
Eosinophylic phascitis
Lymphoneutrophylic:
Herpes infection: viral epithelial changes.
Lymphocytic:
Indeterminate leprosy: acid-fast bacilli are commonly present.
Acrodermatitis chronica atrophicans: epidermal atrophy. telangiectasias; dermal fibrosis.
Behcet disease