Peptide receptor radionuclide therapy with lutetium-177 DOTATATE in a case of recurrent extradrenal retroperitoneal malignant paraganglioma with nodal and bone metastasis

Extra-adrenal retroperitoneal paragangliomas (PGLs) are rare tumors causing considerable difficulty in both, diagnosis and treatment. They can be unicentric or multicentric, tend to be locally invasive and therefore have a high incidence of local recurrence. PGLs shows somatostatin receptor positivity, which can be imaged with technetium-99m (Tc-99m)-hydrazinonicotinyl-Tyr3-octreotide (HYNIC-TOC) and can be treated with lutetium-177 (Lu-177) DOTATATE. We present a case of recurrent unresectable retroperitoneal PGL with nodal and bone metastases in a 27-year-old male, 6 months postsurgery detected with Tc-99m-HYNIC-TOC and was administered with peptide receptor radionuclide therapy using Lu-177 DOTATATE.