Chest CT imaging during the clinical course.
Non-enhanced chest CT revealed high attenuation of the mucoid impaction in the left-lingular lobe on referral (March 2019: CT #1) (a, b). Mucoid impaction in the left-lingular lobe has spread 2 months after referral (May 2019: CT #2) (c). Mucoid impaction in the left-lingular lobe has disappeared 2 months after treatment predonisolone (July 2019: CT #3) (d). Mucoid impaction newly occluded in the left-upper lobe on recurrence of ABPA (September 2021: CT #4) (e). The improvement of mucoid impaction in the left-upper lobe is poor and newly mucoid impactions can be seen in the right-upper lobe, right-lower lobe, and left-upper lobe 3 months after treatment with mepolizumab (November 2021: CT #5) (f, g,and h). All mucoid impactions have disappeared 3 months after treatment with dupilumab (Feburuary 2022: CT #6) (i, j, and k).