J Korean Radiol Soc.  1997 Sep;37(3):515-522.

Simple Bone Cyst: Radiologic Changes after Injection of Steroid

• Kim KW
• Suh KJ
• Park IH
• Kim KH
• Jeon KN
• Kim YS
• Lee SK
• Reyom HK
• Lee JM
• Kim YJ
• Kang DS

Abstract

PURPOSE
To evaluate radiographic changes and clinical effects after the injection of steroid injection into simple bone cyst.
MATERIALS AND METHODS
We analyzed plain radiographic and CT findings after the injection of steroid (methylprednisolone acetate, MPA) into simple bone cyst. Twelve patients were involved; eight were males and four were females, and their ages ranged from 6 to 41 years. They were treated from one to seven times with an intracystic injection of MPA, 80-200mgs per injection. All patients were evaluated by plain film, and four by CT, and the mean follow-up period was 20 months.
RESULTS
Postinjection plain radiographic findings were as follows: increased internal radiodensity (n=10), smaller cyst (n=8), cortical thickening (n=7), and radiodensity of double ring pattern (n=4). CT findings were as follows: increased internal attenuation (n=4), smaller cyst (n=4) and radiodensity of double ring pattern along the cyst wall (n=4). All patients improved clinically and radiologically, especially those with radiodensity of double ring pattern.
CONCLUSION
The injection of steroid into simple bone cyst is an effective treatment. A new radiographic finding after injection is radiodensity of double ring pattern along the cyst wall, and we believe that this indicates progression of the healing process.

Keyword

Bones, cysts; Bone neoplasms, therapy

MeSH Terms

Bone Cysts*
Female
Follow-Up Studies
Humans
Male