Clinical Report: Diagnosis of Biliary Rhabdomyosarcoma in a Young Child
Background
Rhabdomyosarcoma is the most common soft tissue sarcoma in children, yet biliary involvement is rare, comprising about 0.5% of pediatric cases. This case emphasizes the role of advanced imaging techniques in identifying this uncommon malignancy.
Data Highlights
Imaging Modality
Findings
Ultrasound
25 mm × 13 mm × 23 mm hypoechoic solid mass, biliary duct dilation
CT
Low-density mass with marked enhancement in arterial phase
MRI
Irregular lesion with heterogeneous intensity and restricted diffusion
MRCP
Marked dilation of hepatic ducts, poorly visualized common hepatic duct
PET-CT
Round mass with increased metabolic activity
Key Findings
Biliary rhabdomyosarcoma accounts for approximately 0.5% of pediatric RMS cases.
Multimodal imaging is essential for accurate diagnosis and staging of biliary RMS.
Initial misdiagnosis as choledochal cysts is common in cases of biliary RMS.
Histopathology confirmed embryonal RMS in this case.
The patient was treated with VAC chemotherapy after staging as intermediate-risk (stage III).
Clinical Implications
The use of multimodal imaging techniques can facilitate the early and accurate diagnosis of biliary rhabdomyosarcoma.
Conclusion
This case highlights the role of multimodal imaging in diagnosing biliary rhabdomyosarcoma.
