Presentation
Weight loss and fever with unknown origin.
Patient Data
Age: 45 years
Gender: Female
From the case:
Retroperitoneal lymphangioma
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There is a 78 x 38 mm retroperitoneal cystic lesion in the left para-aortic area, just anterior to L2 and L3 which contains thin internal septa.
No obvious enhancement or restriction on DWI images is found in the lesion.
Case Discussion
Regarding the imaging findings, retroperitoneal lymphangioma is the first differential diagnosis. Other differentials include pseudocyst, epidermoid cyst, and lymphocele.
The head and neck, as well as axillary regions, are the most common site of lymphangioma with about 95% prevalence. Approximately 5% of all lymphangiomas occur in the mesentery, retroperitoneum, abdominal viscera, lung, or mediastinum.