Presentation
Staging and better characterization of a retroperitoneal mass detected on abdominal ultrasonography.
Patient Data
A well-defined heterogeneously enhancing retroperitoneal soft tissue mass with areas of cystic necrosis inside is seen along the rightward aspect of the abdominal aorta (opposite L3 & L4 vertebral bodies) with a small portion draping along its anterior aspect near the level of origin of the IMA. The mass is also seen compressing the anterior aspect of the infra-hepatic IVC, contacting the right psoas muscle posteriorly as well as the 3rd part of the duodenum superiorly. It measures about 5.8 x 7 x 6 cm.
Case Discussion
This mass was biopsied and proved to be extra-adrenal pheochromocytoma (paraganglioma) on histopathological examination.
On CT, the mass appeared to be confined to the retroperitoneum with vascular contact to the aorta and IVC with compression of the latter.
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