Hiroshima Yuka, Otomi Yoichi, Shinya Takayoshi, Otsuka Hideki, Harada Masafumi
Tokushima University, Department of Radiology, Tokushima, Japan.
Mol Imaging Radionucl Ther. 2023 Feb 23;32(1):62-64. doi: 10.4274/mirt.galenos.2022.96977.
A 70-year-old man with a tumor in the nasal and paranasal space, was pathologically diagnosed with an alveolar rhabdomyosarcoma, with right cervical lymph node metastasis. Magnetic resonance imaging revealed a primary tumor in the nasal and paranasal sinuses, with associated intracranial infiltration. C-methionine positron emission tomography/computed tomography (PET/CT) revealed increased uptake in the primary tumor and right cervical lymph node metastasis. F-fluorodeoxyglucose PET/CT also revealed increased uptake in the primary tumor and right cervical lymph node. However, the physiological brain uptake overlapped with the primary tumor uptake. Our case suggests the usefulness of C-methionine PET/CT for accurately assessing the extent of alveolar rhabdomyosarcoma, especially in cases with intracranial infiltration or those approximating the brain.
一名70岁男性，鼻腔和鼻窦区有肿瘤，经病理诊断为腺泡状横纹肌肉瘤，伴有右侧颈部淋巴结转移。磁共振成像显示鼻腔和鼻窦有原发性肿瘤，并伴有颅内浸润。碳-蛋氨酸正电子发射断层扫描/计算机断层扫描（PET/CT）显示原发性肿瘤和右侧颈部淋巴结转移灶摄取增加。氟-氟脱氧葡萄糖PET/CT也显示原发性肿瘤和右侧颈部淋巴结摄取增加。然而，生理性脑摄取与原发性肿瘤摄取重叠。我们的病例表明，碳-蛋氨酸PET/CT对于准确评估腺泡状横纹肌肉瘤的范围很有用，特别是在有颅内浸润或接近脑部的病例中。
