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Pediatric mediastinal lymphatic malformation: misdiagnosis analysis and literature review
Wen Zhao1,2, Siqi Zhang3, Xinxin Qi2,4
1Shantou University Medical College, Shantou University, 22 Xinling Road, Jinping District, Shantou, 515041, China.
Insights
Mediastinal cystic lymphatic malformation (MCLM) in children can be mistaken for cystic teratoma. Key imaging differences like absence of fat and minimal CT values help distinguish these pediatric mediastinal masses.
Area of Science:
- Pediatric Radiology
- Thoracic Surgery
- Diagnostic Imaging
Background:
- Mediastinal cystic lymphatic malformation (MCLM) is often misdiagnosed as cystic teratoma in children.
- Accurate differentiation is crucial for appropriate pediatric patient management.
Purpose of the Study:
- To compare clinical and radiologic features of pediatric MCLM and cystic teratomas.
- To identify characteristic pediatric manifestations to improve diagnostic accuracy for MCLM.
Main Methods:
- Retrospective analysis of 12 MCLM and 20 cystic teratoma cases.
- Comparison of clinical and radiologic features including mass morphology, density, and components.
- Literature review of adult MCLM cases for cross-comparison.
Main Results:
- Significant differences observed between MCLM and cystic teratomas in age, shape, CT values, calcification, and fat content.
- Pediatric MCLM cases showed distinct radiological features compared to teratomas.
Conclusions:
- Absence of internal fat, irregular morphology, and minimal CT difference value suggest MCLM.
- Anterior mediastinal location and thymus presence can complicate pediatric MCLM diagnosis.
- Imaging evaluation is paramount for the clinical diagnosis and differential diagnosis of pediatric MCLM.
Objectives:
Mediastinal cystic lymphatic malformation (MCLM) in children is prone to misdiagnosis as cystic teratoma. We compared the clinical and radiologic features between the two diseases and performed a cross-comparison with previous research on adult cases. This study aims to identify characteristic pediatric manifestations to improve diagnostic accuracy.
Methods:
A retrospective study of clinical and radiologic data was conducted on 12 MCLM and 20 cases of cystic teratomas confirmed by pathology or intervention biopsy. Clinical characters and radiology features (mass location and morphology, density, component, secondary complication) were recorded and compared. We reviewed clinical studies on MCLM published in the past decades, analyzing radiological differences and comparing pediatric MCLM cases at our hospital with those in the literature.
Results:
Group comparison in pediatrics between MCLM and cystic teratomas: There were significant age differences (p = 0.036), shape (p = 0.003), CT difference value (p < 0.001), CT difference ratio (p < 0.001), calcification (p < 0.001), fat (p < 0.001), and typing (p < 0.001) between the two diseases. An analysis of literature data on MCLM cases involved 16 studies.
Conclusion:
The absence of internal fat or irregular morphology, along with a minimal CT difference value, may suggest the diagnosis of MCLM. In pediatric cases, anterior mediastinal diseases tend to extend toward the neck, and the presence of the thymus can complicate the component analysis, thereby increasing the risk of misdiagnosis. Clinical diagnosis and differential diagnosis of pediatric MCLM rely heavily on imaging evaluation.
