The histopathology showed granulomas in the dermis consisted of epithelial cells without caseous necrosis in the center,and there was infiltration of lymphocytes in and around the granulomas.

• 皮损组织病理检查示:真皮内可见由上皮样细胞构成的肉芽肿,中央无干酪样坏死,肉芽肿及其周围有淋巴细胞浸润。