Abstract
Synovial sarcoma is a rare and aggressive tumor, typically found in the extremities,
with intra-abdominal cases being exceptionally uncommon. We present a 47-year-old
male with abdominal pain and significant weight loss, whose imaging revealed a retroperitoneal
mass originating from the duodenojejunal flexure. Computed tomography demonstrated
a lobulated mass with heterogeneous enhancement, cystic and necrotic areas, and perilesional
lymphadenopathy. Despite extensive imaging, definitive diagnosis required histopathological
confirmation. Intraoperatively, a closed-loop perforation and vascular invasion rendered
the tumor unresectable. Given the extreme rarity and diagnostic challenges of intra-abdominal
synovial sarcoma, a multidisciplinary approach is essential. Comprehensive radiological
evaluation, assessing mass morphology, vascular involvement, resectability, and metastatic
potential, is crucial for accurate diagnosis and treatment planning. This case highlights
the importance of advanced imaging in managing rare abdominal malignancies.
Keywords
intra-abdominal sarcomas - soft-tissue mass - synovial sarcoma
