CONTEXT: We investigated the role of 68Ga-DOTATOC PET/CT in detecting somatostatin receptors (SSTRs) in 19 patients with metastatic adrenocortical carcinoma (ACC) and explored the activity of 90Y/177Lu-DOTATOC Peptide Receptor Radionuclide Therapy (PRRT).
CASE DESCRIPTION AND METHODS: 68Ga uptake in metastatic sites was scored in terms of intensity and anatomical uptake distribution of standard uptake value (SUV). Tissue expression of SSTR2A and SSTR5 was also evaluated by immunohistochemistry (IHC) on primary tumors. Eight patients (42%) displayed radiometabolic uptake of any grade intensity with focal and limited distribution. Two patients (11%) displayed strong uptake in multiple lesions and were treated with PRRT. Both obtained an overall disease control lasting 4 and 12 months, respectively.
CONCLUSIONS: ACC can express SSTRs as detected by IHC and 68Ga-DOTATOC PET. SSTRs-based PRRT may represent a potential treatment opportunity for a minority of advanced ACC patients. This treatment modality deserves further investigation.
|Journal||The Journal of clinical endocrinology and metabolism|
|Publication status||E-pub ahead of print - Oct 21 2019|