Acetabular intraosseous
cysts are frequently encountered in patients with dysplasia or
femoroacetabular impingement. Small
cysts are typically addressed by removing the
cyst lining and stimulating healing via
microfracture or abrasion chondroplasty. In contrast, larger
cysts involving 1-3 cm(3) frequently require additional fortification with bone graft material to facilitate osseous ingrowth and
cyst healing. Previous arthroscopic reports have described the use of rim trimming to access the extra-articular side of the
cyst, with subsequent use of straight
metal cannulas for delivery of bone graft material. The downsides of this technique include the requirement for rim trimming, which may be ill advised in patients with normal coverage or dysplasia, as well as the creation of a second breach in the
cyst wall, precluding pressurization of the bone graft material. We describe an arthroscopic technique using a curved delivery device allowing for deeper penetration into the
cyst cavity through the articular side and greater delivery of bone graft material.