Parihar Ashwin Singh, Sood Apurva, Sood Ashwani, Gulati Ajay, Mittal Bhagwant Rai
Departments of Nuclear Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Department of Radiodiagnosis, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Asia Ocean J Nucl Med Biol. 2020 Spring;8(2):132-135. doi: 10.22038/AOJNMB.2020.44324.1297.
We present the case of a 60-year-old man with metastatic neuroendocrine tumor of the ileum following ileal resection, being evaluated for Lu-based peptide receptor radionuclide therapy. Ga-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 Lu-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.
我们报告一例60岁男性,患有回肠转移性神经内分泌肿瘤,在回肠切除术后接受基于镥的肽受体放射性核素治疗评估。镓-多他萘辛PET/CT显示阴囊区域有局灶性示踪剂摄取增加,而相应的CT图像上无任何形态学改变。在镥-多他肽治疗后的治疗后全身成像中也可见类似的示踪剂摄取增加。超声引导下细针穿刺活检的细胞病理学检查未发现恶性细胞。该病例表明,睾丸局灶性示踪剂摄取不一定总是病理性的,可能代表一种正常的生理变异,类似于文献中先前报道的弥漫性睾丸生长抑素受体表达。