A biopsy on the right nasolabial fold showed dermal granuloma formation around hair follicles, composed of lymphocytes, epithelioid histiocytes and occasional multinucleated giant cells.

• 病理下可见真皮内的毛囊旁有肉芽肿产生，内含淋巴球、表皮样组织细胞以及少数的多核巨大细胞。