Infant with difficulty with nose breathing when the left nostril is occluded Pediatric Imaging Neurological April 5, 2023February 14, 2023 Axial CT without contrast of the face shows thickening and bowing of the vomer to the right resulting in narrow right choana. The diagnosis was membranous right choanal atresia. Related Published April 5, 2023February 14, 2023