This Bombesin (BBN), a tetradecapeptide analog of human gastrin-releasing peptide (GRP) with a high binding affinity for GRP receptors (GRPR), is overexpressed in early stages of androgen-dependent prostate carcinomas, but not in advanced stages. Therefore, there is a need to develop effective tracers for the accurate and specific detection of this disease. The objective of this study was to evaluate Lys 1 , Lys 3 -DOTA-BBN (1,14) analog with the radiolabeled positron emitter [ 68 Ga]-Ga-BBN for receptor imaging with PET, and to determine its biodistribution and radiation dosimetry using whole-body (WB) PET scans in healthy volunteers. The highest uptake was in the pancreas, followed by urinary bladder. The critical organ was pancreas with a mean absorbed dose of 206 ± 0.7, 210 ± 0.7, 120 ± 0.9, 390.23 ± 0.6 µGy/MBq and the effective doses were estimated as 73.2 ± 0.6, 49.8 ± 0.3 µGy/MBq (women and men, respectively).

Hemangioendothelioma epithelioid is a rare tumor that originates in soft tissues. Imaging evaluation with conventional modalities (tomography and magnetic resonance) is difficult. Novel radiotracers which capably evaluate angiogenesis may have a higher impact on the therapeutic decisions. A 45-year-old man underwent workup for thrombosis and was diagnosed with hemangioendothelioma epithelioid based on the results of liver pathology and immunohistochemistry. The decision of the multidisciplinary board was to begin with thalidomide. After 4 months, progression of disease was documented and right hepatectomy was performed. A 68 Ga-DOTA-E-[c(RGDfK)]2 positron emission tomography–computed tomography scan showed residual lesions. After documented angiogenesis by 68 Ga-DOTA-E-[c(RGDfK)]2 positron emission tomography–computed tomography, nintedanib was administrated. And 1 year later, progression of the disease was documented by positron emission tomography–computed tomography. Ipilimumab plus nivolumab was started and partial response and excellent clinical response were documented. Molecular imaging with 68 Ga-DOTA-E-[c(RGDfK)]2 positron emission tomography–computed tomography is a good biomarker of the response of hemangioendothelioma epithelioid, and ipilimumab plus nivolumab therapy demonstrated a good response.