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Updated: Oct 12, 2026

Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
Published on: April 11, 2012
Cyst-like defects following fractures in children
Insights
Pediatric greenstick fractures can cause benign, cyst-like bone defects near the fracture site. These resorption cysts, related to periosteal reaction, do not affect fracture healing and often resolve over time.
Area of Science:
- Pediatric Orthopedics
- Pediatric Radiology
- Pediatric Bone Healing
Background:
- Greenstick fractures are common incomplete fractures in children.
- These fractures involve the periosteum, leading to a subperiosteal hematoma and periosteal reaction.
- The study investigates unusual bone defects observed after pediatric greenstick fractures.
Observation:
- Nine children presented with radiolucent, cyst-like cortical defects.
- Lesions appeared weeks after greenstick fractures in the undamaged radius, proximal to the fracture line.
- Defects varied in size (3-7 mm diameter) and shape, often multiple and within the periosteal reaction zone.
Findings:
- Fracture healing remained unaffected despite the presence of these cyst-like defects.
- In three patients, the lesions resolved spontaneously within three years.
- The defects are characterized as benign resorption cysts linked to periosteal reaction and hematoma.
Implications:
- These findings help differentiate benign post-fracture bone changes from more serious conditions in children.
- Understanding these resorption cysts can reduce unnecessary patient anxiety and diagnostic procedures.
- Radiologists and orthopedic surgeons should be aware of these transient lesions following pediatric greenstick fractures.
Abstract:
Cyst-like cortical defects appearing a few weeks after a greenstick fracture in the undamaged part of the radius were observed in 9 children. Five children showed multiple lesions. These radiolucent cyst-like defects 2.4 to 48 mm proximal to the fracture line seemed to be situated within the zone of periosteal reaction. The diameter of the cyst-like defects varied from 3 to 7 mm, usually they were rounded or slightly oval. Fracture healing was unaffected. In three of the patients the lesions had disappeared on to three years later. We are convinced that these benign lesions are resorption cysts within the excessive periosteal reaction and related to the subperiosteal hematoma accompanying the greenstick fractures.
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