KLK3 and posterior cortical atrophy: In addition, Das and Yeh [38] illustrated a [68Ga]Ga-PSMA-11 metastasis in the right atrium, subsequently confirmed by endomyocardial biopsy, in a 78-year-old man with PCa ISUP 4 (PCa) initially treated with external beam radiation therapy and imaged for BCR due to serum PSA of 2.5 ng/mL.