PTGER4 and sarcoidosis: Notably, prostaglandin E receptor 4 (PTGER4), aldo-keto reductase family 1 member C1 (AKR1C1), phospholipase A2 group VI (PLA2G6), aldo-keto reductase family 1 member C3 (AKR1C3), leukotriene A4 hydrolase (LTA4H), and phospholipase A2 group VI (PLA2G7) mRNA levels exhibited potential significance for distinguishing sarcoidosis from healthy controls, each yielding an AUC value exceeding 0.85 (Table 3).