Similar to our findings, Valeyre et al. (13) found a large increase in the percentage of lymphocytes in BAL fluid of sarcoid patients with Löfgren's syndrome, and Drent et al. (12) identified that patients with erythema nodosum and/or arthralgia and hilar lymphadenopathy have the highest CD4/CD8 ratio compared with other sarcoid patients. Here, CD8A is linked to Löfgren’s syndrome.