CT及MR诊断右侧额骨黏液性纤维肉瘤一例

CT and MR Scans Diagnosed Myxoid Fibrosarcoma of the Right Frontal Bone

摘要: 报告一例经CT及MRI诊断的右侧额骨黏液性纤维肉瘤。患者无诱因出现发现头皮肿物一年，伴进行性增大，伴头颈部隐痛。CT检查：右侧额骨溶骨性骨质破坏并软组肿块影形成，呈囊实性伴有斑点高密影，增强扫描实性部分明显强化。MRI：病灶外周为等T1等及稍低T2信号，内部为长T1长T2并夹杂少许短T1短T2信号，病灶内部明显弥散受限，外周实性成分明显强化并累及邻近脑膜及血管，可见“尾征”，右侧额叶受压水肿。术后病理提示黏液性纤维肉瘤。发生在额骨的骨源性纤维性黏液肉瘤极其罕见，也缺乏特征性的影像学征象，通过回顾性病例分析及文献学习，总结及学习该病部分影像学特征，提高诊断准确性。

Abstract: A case of myxoid fibrosarcoma of the right frontal bone diagnosed by CT and MRI was reported. The patient presents with an unprovoked scalp mass for one year, with progressive enlargement and vague pain in the head and neck. CT examination: lytic bone destruction of the right frontal bone and formation of a soft mass shadow, which was cystic solid with speckled hyperdense shadow, and the solid part of the enhanced scan was significantly enhanced. MRI: the peripheral of the lesion was equal to T1 and slightly lower T2 signals, the inside was long T1 and long T2 with a little short T1 and short T2 signals, the internal diffusion of the lesion was obviously limited in diffusion, the peripheral solid components were significantly strengthened and involved the adjacent meninges and blood vessels, and the “tail sign” was seen, and the right frontal lobe was compressed and edema. Postoperative pathology suggests mycinous fibrosarcoma. Osteogenic fibrous myxosarcoma occurring in the frontal bone is extremely rare and lacks characteristic imaging signs, so through retrospective case analysis and literature study, some imaging features of the disease were summarized and learned to improve the diagnostic accuracy.