Fig. 1

Two consecutive PNSCT images in coronal sections. A Taken in May 2019, partial and mild demineralization areas with osteopenia are seen in the ethmoid cell walls. B PNSCT section taken 15 months later in September 2020 and crossing approximately the same level of ethmoid cells. The patient has been using 3 courses of irregular nasal steroids in this 15-month period. This slice of PNSCT was interpreted as a slight increase in osteitis