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Limp as unusual presentation of Langerhans' cell histiocytosis
E Bodart1, J F Nisolle, P Maton
1Department of Paediatrics, Cliniques UCL de Mont-Godinne, Yvoir, Belgium.
Unlabelled:
An isolated eosinophilic granuloma involving the posterior elements of a lumbar vertebra is reported in a 3-year-old boy presenting with progressive limp. Radiological investigations revealed osteolysis of the L5 right pedicle. MRI showed a well-defined homogeneous mass with nonspecific signal intensity. An unusual feature was the paravertebral muscular location of the largest part of the tumour indicating a possible soft tissue origin. Immunohistochemical studies were typical for Langerhans' cell histiocytosis.
Conclusion:
A limp can be due to lumbar and paravertebral muscular location of Langerhans' cell histiocytosis.
Insights
A rare case of Langerhans' cell histiocytosis (LCH) presented as an isolated lumbar vertebral tumor in a young boy, causing a progressive limp. This highlights LCH as a potential cause of pediatric limp due to vertebral and soft tissue involvement.
Area of Science:
- Pediatric Orthopedics
- Pediatric Oncology
- Histopathology
Background:
- Langerhans' cell histiocytosis (LCH) is a rare clonal proliferative disorder.
- Isolated vertebral involvement of LCH is uncommon, especially with significant soft tissue extension.
- Pediatric limp can have diverse etiologies, necessitating thorough investigation.
Observation:
- A 3-year-old boy presented with a progressive limp.
- Radiological imaging revealed osteolysis of the L5 right pedicle.
- MRI demonstrated a well-defined mass with unusual paravertebral muscular extension, suggesting a soft tissue origin.
Findings:
- Immunohistochemical studies confirmed the diagnosis as Langerhans' cell histiocytosis.
- The tumor involved the posterior elements of a lumbar vertebra and adjacent soft tissues.
- The paravertebral muscular location was an unusual feature for this condition.
Implications:
- This case underscores the importance of considering LCH in the differential diagnosis of pediatric limp, even with atypical presentations.
- Early diagnosis and appropriate management of LCH are crucial for favorable outcomes in children.
- The findings expand the understanding of LCH's diverse clinical and radiological manifestations in pediatric patients.