Kimura disease
Kimura disease is a benign and chronic inflammatory disorder of unknown etiology, occurring mainly in Asian countries (very rarely in Western countries) and predominantly affecting young men, that usually presents with a solitary or multiple non-tender subcutaneous masses in the head and neck region (in particular the preauricular and submandibular area) and/or generalized painless lymphadenopathy, often with salivary gland involvement. Characteristic laboratory findings include blood eosinophilia and markedly elevated serum immunoglobulin E (IgE) levels. It is often associated with autoinflammatory disorders (i.e. ulcerative colitis, bronchial asthma) and a co-existing renal disease.