Presentation
Left flank pain
Patient Data
Age: 80 years
Gender: Male
From the case:
Retroperitoneal paraganglioma
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Axial non-contrast

CT shows a lobulated cystic mass with heterogeneous enhancement located in the left paraaortic area. Small simple cysts in bilateral kidney.
From the case:
Retroperitoneal paraganglioma
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Axial bone window

CT-guided percutaneous retroperitoneal mass biopsy was performed with the prone position approach.
From the case:
Retroperitoneal paraganglioma
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200x H&E

Tumor cells arranging in a solid pattern with a large granule and basophilic cytoplasm. The cell nuclei are variable in size with prominent nucleoli. The cells positively react with Chromogranin and Synaptophysin
Case Discussion
This case demonstrated typical findings of a retroperitoneal paraganglioma. The cystic mass located in the left paraaortic area. The histopathology has confirmed the diagnosis.