Abstract
Recently introduced Gallium-68 labeled PSMA-ligands such as HBED-CC (68Ga-PSMA) have shown promise for unmet diagnostic needs in prostate cancer. 68Ga-PSMA has demonstrated improved detection rates and specificity for prostate cancer compared to standard imaging approaches. In the setting of primary disease, 68Ga-PSMA appears to preferentially identify treatment-relevant intermediate and high-risk prostate cancer. There is also a growing evidence that 68Ga-PSMA positron emission tomography (PET) outperforms alternative conventional imaging methods including choline-based radiotracers for the localization of disease sites at biochemical recurrence, particularly at lower prostate-specific antigen (PSA) levels (<1ng/mL). However, the majority of published work lacks rigorous verification of imaging results. 68Ga-PSMA offers significant promise for both, primary disease and biochemically recurrent prostate cancer. The evidence base to support 68Ga-PSMA is however still underdeveloped, and more rigorous studies substantiating efficacy are needed.
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