Diagnostic Value of CT Arthrography for Evaluation of Osteochondral Lesions at the Ankle

Table 2

Detailed specifications of the indications for CTA and surgeries.

A: indication	Number of cases ()
OCL fragment instability? (Figure 4)
OCL extend?
Subchondral cyst or ganglia fissural defect? (Figure 1)
Subchondral BMEL fissural/cartilage defect? (Figure 2)
After cartilage repair surgery
Bone necrosis/infarct cartilage involvement?
No findings on MRI but persistent complaints cartilage defect?
B: previous surgery	Number of cases ()
Osteochondral transplantation
Autologous chondrocyte implantation
Biomatrix implantation
Retrograde drilling
Curettage of ganglion/cyst and spongiosa graft
Surgical treatment of ankle fractures
Tumor surgery (giant cell tumor)
Arthroscopy (debridement, shaving)
C: surgery after CTA	Number of cases ()
Osteochondral transplantation
Microfracturing/antegrade drilling
Spongiosa graft
Only chondral and osseous debridement
Metal implant removal
Syndesmosis reconstruction

A: indications including clinical queries (); B: previous surgeries; C: surgeries after CTA.
were one chondroblastoma at the talus and one giant cell tumor at the tibia.
OCL: osteochondral lesion; BMEL: bone marrow edema-like lesion.