Incidental Uptake of In-111 Ibritumomab Tiuxetan in Surgically Treated Fracture

In-111 ibritumomab tiuxetan pretherapy imaging is performed prior to radioimmunotherapy with Y-90 ibritumomab tiuxetan in patients with lymphoma in order to estimate the biodistribution of the radiolabeled antibodies. We report the case of a 61-year-old woman with relapsed follicular lymphoma. In-111 ibritumomab tiuxetan pretherapy imaging showed tracer accumulation in a surgically treated fracture of the left calcaneus as well as in the involved lesions. The patient had fractured her left calcaneus 6 months before the radioimmunotherapy, and fracture of the left calcaneus without lymphoma involvement had been revealed operatively at that time. Clinical features and magnetic resonance imaging (MRI) indicated an inflammatory response in the left heel. We concluded that this inflammation played an important role in the uptake on pretherapy imaging. It should be kept in mind that the inflammation is a differential diagnosis of lymphoma involvement in In-111 ibritumomab tiuxetan pretherapy imaging. To the best of our knowledge, this is the first case report of In-111 ibritumomab tiuxetan uptake in a surgically treated fracture.

奥曲肽及其类似物用于肿瘤诊断的进展

简要综述111In-奥曲肽和99Tcm-NeoTec在肿瘤诊断中的应用,其对类癌、甲状腺髓样癌、来自胰腺或上消化道的神经内分泌肿瘤的诊断和随访有重要价值,对失去摄碘功能的分化型甲状腺癌、甲亢性突眼、肉样瘤病的肉芽肿过程也可得到阳性结果。应用放射性核素标记的生长抑素类似物使肿瘤成功的显像,可发展并应用标记的类似物来治疗这些肿瘤。生长抑素类似物的标记技术扩展了应用其他肽类进行分子显像的研究兴趣。