“Kimura disease is a rare benign chronic inﬂammatory disease that usually involves deep subcutaneous tissue and lymph nodes of the head and neck region with frequent regional lymphadenopathy or salivary gland enlargement. Other sites of involvement including the oral cavity, axilla, groin, limbs, and trunk have also been described. Systemic symptoms (fever, night sweats, and weight loss) are not common. This disease is most common in middle-aged Asian men.”
Source: Archives of Pathology —Vol 131, April 200
The cause(s) have not yet been identified. Treatments include surgical resection, regional or systemic steroid therapy, cytotoxic therapy, and radiation.
More info. at Wikipedia