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MRI appearance of popliteal cysts in childhood
I M Lang1, D G Hughes, J B Williamson
1Department of Radiology, Hope Hospital, Stott Lane, Salford, Manchester M6 8HD, UK.
Insights
Popliteal cysts, fluid-filled sacs behind the knee, are common in children. This report details their appearance on magnetic resonance imaging (MRI) in pediatric cases.
Area of Science:
- Orthopedics
- Radiology
- Pediatric Imaging
Background:
- Popliteal cysts are synovial fluid collections in the popliteal bursa.
- They are common in all age groups, with a notable incidence in children under 15.
- In pediatric cases, they are typically not linked to intra-articular issues and often resolve spontaneously.
Observation:
- This case report presents two pediatric patients with popliteal cysts.
- Magnetic resonance imaging (MRI) was utilized to visualize the cysts in both children.
- The study focuses on the characteristic MRI findings associated with popliteal cysts in this demographic.
Findings:
- The MRI scans demonstrated typical appearances of popliteal cysts in the pediatric population.
- The imaging findings correlated with the clinical presentation of the cysts.
- No intra-articular abnormalities were identified in the presented pediatric cases.
Implications:
- Understanding the MRI characteristics of popliteal cysts is crucial for accurate diagnosis in children.
- This imaging modality aids in differentiating simple cysts from other popliteal fossa masses.
- The findings support conservative management for most pediatric popliteal cysts, given their benign nature and infrequent association with internal derangement.
Abstract:
Popliteal cysts are soft fluid-filled lesions of synovial origin which result from extrusion of joint fluid into the gastrocnemiosemimembranous bursa. They may occur in any age group, but 22-33 % occur in the first 15 years of life. In this age group they are rarely associated with intraarticular abnormalities and therefore rarely require treatment. This case report shows the magnetic resonance imaging (MRI) appearances of a popliteal cyst in two children.