Fig. 2From: Evaluation of safety and efficacy of allogeneic adipose tissue-derived mesenchymal stem cells in pediatric bronchiolitis obliterans syndrome (BoS) after allogeneic hematopoietic stem cell transplantation (allo-HSCT)Chest CT images of the third case, who developed COVID-19 infection four months after AT-MSC therapy (panels A and B). Two weeks later, pneumomediastinum, pneumopericardium, and subcutaneous emphysema (orange arrows) progressed (panels C and D); however, these abnormalities did not show a significant progression (blue arrows) in images obtained 12 months later (panels E and F)Back to article page