FIGURE LEGENDS
Fig 1. The imaging features of fibrous dysplasia located in the
sphenoid bone in a 56-year-old patient (patient 1 in Table 1) in
different dimensional CT scans (A). Because of no symptoms, the patient
accepted a biopsy, which was identified as fibrous dysplasia. The
patient was followed up until now. The image shows the nasal cavity and
sinus of the patient eight years after the biopsy (B). (CT, computed
tomography).
Fig 2. The imaging features of a 2-year-old patient (patient 3
in Table 2). The images show the axial and coronal views of CT scans and
the sagittal view of the MRI of the paranasal sinuses before the
operation (A). The removal of a fibrosis dysplasia lesion in the ethmoid
bone under FESS (B). The mass removed from the ethmoid bone in the
operation was confirmed to be fibrosis dysplasia by pathological
examination (B). The photos under nasal endoscopy showed the nasal
cavity after the endonasal endoscopic operation 3 months later and 1
year later, respectively (B). The white arrow shows the place of the
removed lesion in the ethmoid bone. (MFD, monostotic fibrous dysplasia;
CT, computed tomography; MRI, magnetic resonance imaging; FESS,
functional endoscopic sinus surgery).
Fig 3. The imaging features of MAS in a ten-year-old patient
(patient 4 in Table 3) (Fig. 3A and 3B). Images used during the
navigation-assisted operation: sagittal, coronal, and axial scans, and
the video (The first and the second operation: 3A and 3B). The patient
received left optic nerve decompression using an endoscopic endonasal
approach. Then the patient received left optic nerve decompression again
one and a half years later because of her left visual loss again. The
green dot shows the left orbital apex region (3A, 3B). Fig.3C showed the
images used to aid image-guided navigation in MFD endoscopic sinus
surgery (patient 9 in Table 2) . The white arrow shows the thin layer of
fibrous tissue between the fibrous dysplasia lesions and the sphenoid
bone (Fig.C). Fig.3D showed the imaging features of fibrous dysplasia
with degeneration changes (patient 5 in Table 2). The paranasal sinus CT
of MFD showed frosted glass changes of the left sphenoid pterygoid
process and the great wing, with a 2.3× 1.0 cm soft tissue
shadow, which was diagnosed as hyaline degeneration by pathological
examination (Fig.3D). The CT scan showed the cystic degeneration of FD
(Fig.3E-H). Axial CT scan of the 17-year-old patient (patient 1 in Table
3) with PFD showed the bilateral optic nerve compression due to cystic
degeneration of FD (Fig.3E). The CT scan of two years before surgery
revealed that the left optic nerve was completely encased and the right
optic nerve was partially encased by FD (Fig.3F,G,H). (CT, computed
tomography; MFD, monostotic fibrous dysplasia; PFD, polyostotic fibrous
dysplasia; FD, fibrous dysplasia)