. 2018 Jun 4;7(7):e691–e697. doi: 10.1016/j.eats.2018.03.005

Table 3.

Pearls and Pitfalls

Pearls	Pitfalls
Preoperative evaluation and planning with computed tomography is indispensable. Use the 30° arthroscope at the time of working in the extracapsular space under the guidance of an image intensifier. Confirming the exact location of shelf graft and acetabular cysts under fluoroscopic visualization is crucial. Bone cyst is identified in the transverse slot with the scope. A vertical slot is useful to remove the cystic contents and stuff corticocancellous bone tips into the cystic cavity.	Difficulty of treating cysts at posterior acetabulum with the same portal as shelf acetabuloplasty.

Pearls

Pitfalls

Preoperative evaluation and planning with computed tomography is indispensable.
Use the 30° arthroscope at the time of working in the extracapsular space under the guidance of an image intensifier.
Confirming the exact location of shelf graft and acetabular cysts under fluoroscopic visualization is crucial.
Bone cyst is identified in the transverse slot with the scope.
A vertical slot is useful to remove the cystic contents and stuff corticocancellous bone tips into the cystic cavity.

Difficulty of treating cysts at posterior acetabulum with the same portal as shelf acetabuloplasty.