A 43-year-old white male sought treatment for swelling of the left brow, which started after sustaining direct blunt trauma to the left bony orbit 6 months prior. Magnetic resonance imaging with contrast showed a 5.6 × 2.7 mm T1 bright focus at the anterior aspect of the left supraorbital rim. On the postgadolinium fat-saturated axial T1 images, the lesion demonstrated fat signal but was not suppressed in T1 with fat suppression. Upon excision, the lesion was found to be an encapsulated orbital rim lipoma, which was unexpected given the hyperintensity on T1 with fat suppressed magnetic resonance imaging. The lesion did not return after excision. Orbital lipomas are rare benign neoplasms with only a handful of cases in literature. This is the first report of a posttraumatic encapsulated lipoma presenting on the brow or orbit. Although rare, lipomas should be on the differential of post-traumatic lesions affecting the orbit and the orbital rim.

中文翻译：

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创伤后包裹的眼眶脂肪瘤。

一名43岁的白人男性寻求对左眉肿胀的治疗，该治疗始于6个月前对左骨眶直接造成钝器损伤。带有对比的磁共振成像显示在眶上缘的前部有一个5.6×2.7 mm T1明亮的焦点。在ga后脂肪饱和的轴向T1图像上，病变显示出脂肪信号，但在抑制脂肪的T1中未得到抑制。切除后发现病变是包囊的眼眶缘脂肪瘤，考虑到T1上的高强度脂肪抑制的磁共振成像，这是出乎意料的。切除后病变未复发。眼眶脂肪瘤是罕见的良性肿瘤，文献中仅有少数病例。这是出现在额头或眼眶的创伤后包裹的脂肪瘤的首次报道。虽然很少见