demonstration of focal physiologic in-vivo somatostatin receptor expression in the caput epididymis of the testes on 68ga-dotanoc pet/ct and 177lu-dotatate post-therapy whole body scintigraphy

We present the case of a 60-year-old man with metastatic neuroendocrine tumor of the ileum following ileal resection, being evaluated for 177lu-based peptide receptor radionuclide therapy. 68ga-dotanoc pet/ct showed focal increased tracer uptake in the scrotal region without any morphologic changes on the corresponding ct images. similar increased tracer uptake was seen on post-therapy whole-body imaging following 177lu-dotatate therapy. an usg guided fna revealed no malignant cells on cytopathologic examination. this case illustrates that focal testicular tracer uptake, may not always be pathological and can represent a normal physiologic variant, similar to the diffuse testicular somatostatin receptor expression as previously reported in literature.