Hilar and mediastinal sarcoid-like reaction after the treatment of malignant tumors: imaging features and natural course on

This study aimed to assess the imaging features and natural course of hilar and mediastinal sarcoid-like reaction onSixteen patients with the appearance of sarcoid-like reaction seen onThe maximum standardized uptake values of sarcoid-like reaction were 3.8-13.6 (mean 6.8). FDG uptake of hilar nodes was symmetrical in 12 (75%) patients and asymmetrical in 4 (25%). The time interval between the initiation of therapy and appearance of sarcoid-like reaction was 9-86 months (median 27.1 months). Among 14 patients who underwent further follow-up usingAfter the treatment of malignancies, benign sarcoid-like reaction was rarely observed during follow-up. Although sarcoid-like reaction appeared a long time after the treatment of malignancies, it frequently and spontaneously regressed in a relatively short period of time.