How is course of sarcoidosis?

Often benign with good prognosis, spontaneous remission 60-70% of cases. Factors of bad prognosis (black race, age >40, lupus pernio, chronic uveitis, chronic hypercalicemia, nephrocalcinosis, progressive pulmonary involvement, neurosarcoidosis, cardiac involvement, nasal mucosal involvement, cystic bone lesions)