From the Department of Diagnostic Imaging, National University Hospital of Singapore, Singapore.
Clin Nucl Med. 2017 Oct;42(10):e444-e446. doi: 10.1097/RLU.0000000000001772.
A 55-year-old man with large B-cell lymphoma developed atraumatic left shoulder pain. F-FDG PET/CT revealed new left supraspinatus and infraspinatus muscle uptake while the initial disease resolved. Given the discrepancy between initial disease treatment response and new left shoulder findings, an MRI scan was performed. This demonstrated diffuse supraspinatus and infraspinatus muscle edema and enhancement with no focal lesion. Muscle biopsy was negative for lymphoma, but features of muscle denervation were seen. Overall, clinical and imaging findings were compatible with Parsonage-Turner syndrome (acute brachial neuritis), an uncommon condition that presented as a false-positive finding on PET/CT.
一位 55 岁患有大 B 细胞淋巴瘤的男性患者出现无创伤性左肩部疼痛。18F-FDG PET/CT 显示最初疾病缓解的同时出现新的左冈上肌和冈下肌摄取。鉴于初始疾病治疗反应与新的左肩部发现之间的差异，进行了 MRI 扫描。MRI 显示弥漫性冈上肌和冈下肌水肿和增强，无局灶性病变。肌肉活检未发现淋巴瘤，但可见肌肉失神经支配的特征。总的来说，临床和影像学表现符合帕森尼格-特纳综合征（急性臂丛神经炎），这是一种罕见的疾病，在 PET/CT 上表现为假阳性结果。
