Diagnostic Power of the CD4+/CD8+ Ratio and the Expression of Activation and Memory Markers in Differentiating Sarcoidosis from Tuberculosis, Idiopathic Pulmonary Fibrosis, and Other Interstitial Lung Diseases

Combining the CD4/CD8 ratio (> 3.7) with the expression of CD38, CD62L, and memory markers is a promising new tool for the differential diagnosis of sarcoidosis.