Imaging Features of Fat Necrosis

Chan, Lai Peng; Gee, Richard; Keogh, Ciarán; Munk, Peter L.

doi:10.2214/ajr.181.4.1810955

Cited by 66 publications

(49 citation statements)

References 8 publications

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“…And they showed the statistically significant radiologic predictors of atypical lipomatous tumor as male sex, presence of thick septa, and associated nonadipose masses. However, these findings have also been reported in pathologically proven cases with necrotic lipoma as seen in the present case [3,5,6]. And, because of its rarity, it is not well known that a lipoma with fat necrosis may show similar MRI findings to atypical lipomatous tumor.…”

Section: Discussionsupporting

confidence: 72%

Giant Lipoma with Fat Necrosis of the Back Mimicking Atypical Lipomatous Tumor in MRI Findings

Nakamura¹

2013

J Clin Exp Dermatol Res

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Section: Discussionsupporting

confidence: 72%

Giant Lipoma with Fat Necrosis of the Back Mimicking Atypical Lipomatous Tumor in MRI Findings

Nakamura¹

2013

J Clin Exp Dermatol Res

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“…The MR appearance of fat necrosis depends on the timing after trauma. It can appear spiculated, globular or more laminar [27], and sometimes may mimic a type IV (pseudonodular) ML lesion [7]. …”

Section: Discussionmentioning

confidence: 99%

Imaging Features of Morel-Lavallée Lesions

Coninck

Vanhoenacker²,

Verstraete

2017

Journal of the Belgian Society of Radiology

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Objectives:To review the imaging characteristics of Morel-Lavallée lesions with both ultrasound and magnetic resonance imaging (MRI).Materials and Methods:We retrospectively analyzed 31 patients (mean age = 46 years), diagnosed with a Morel-Lavallée lesion, on ultrasound (n = 15) or MRI (n = 16). On ultrasound the echogenicity, internal septations, hyperechoic fat globules, compressibility and Doppler signal were evaluated. On MRI, T1- and T2-signal intensity, capsule presence, internal septations, enhancement, mass-effect and fluid-fluid levels were assessed. The MR images were classified according to the classification of Mellado and Bencardino.Results:Most of the lesions were situated peritrochanteric, around the knee or the lower leg. The majority of the lesions had a heterogeneous hypoechoic appearance with septations and intralesional fat globules. On MRI, most of the collections were hypointense on T1-weighted images and hyperintense on T2-weighted images. Half of the collections were encapsulated, and most collections demonstrated septations. The collections were classified as seroma (n = 10), subacute hematoma (n = 2) and chronic organizing hematoma (n = 5).Conclusion:Ultrasound is the imaging method of choice to diagnose Morel-Lavallée lesions. MRI can be of use in selected cases (extension in different compartments, large collections, superinfection). Characteristic imaging features include a fusiform fluid collection between the subcutaneous fat and the underlying fascia with internal septations and fat globules. On MRI, six types of ML lesion can be differentiated, with the seroma, the subacute hematoma, and the chronic organizing hematoma being the most frequently observed lesions.

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“…Lipomas present certain characteristic findings on CT and MRI 2. However, only a few reports have described both radiographic and histological findings in cases of lipoma with necrosis 3 4. In the present report, we describe a case of a man with a necrotic lipoma located at the posterior thigh that was preoperatively misdiagnosed as a liposarcoma on MRI.…”

Section: Introductionmentioning

confidence: 72%

“…In the present case, the tumour contained non-lipomatous lesions with good enhancement on gadolinium administration, which potentially indicated the presence of a malignant component. Chan et al 4 reported the imaging features of two cases of necrotic lipoma, where the necrotic area appeared as an amorphous cloud-like stranding and serpentine-like feature rather than a nodular pattern; however, the authors reported that the imaging findings of necrotic lipoma can be distinguished from liposarcoma. The enhanced lesion on MRI in the present case did not contain atypical cells, and we suspect that the lesion was related to the revascularisation of fibrous tissue after fat necrosis.…”

Section: Discussionmentioning

confidence: 99%

Necrotic lipoma at the posterior thigh mimicking liposarcoma

et al. 2016

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SUMMARYA lipoma is one of the most common benign tumours and can develop at any location in the body. Lipomas present characteristic imaging features; hence, they are easy to identify on CT and MRI. However, cases of necrotic lipoma are rarely encountered; therefore, information on the imaging findings of necrotic lipomas is scarce. In the present report, we describe the case of a 63-year-old man with necrotic lipoma in the deep layer of the posterior thigh, which resembled a liposarcoma on imaging. To the best of our knowledge, only a few reports on necrotic lipoma on the extremities have been published. BACKGROUND

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Imaging Features of Fat Necrosis

Cited by 66 publications

References 8 publications

Giant Lipoma with Fat Necrosis of the Back Mimicking Atypical Lipomatous Tumor in MRI Findings

Giant Lipoma with Fat Necrosis of the Back Mimicking Atypical Lipomatous Tumor in MRI Findings

Imaging Features of Morel-Lavallée Lesions

Necrotic lipoma at the posterior thigh mimicking liposarcoma

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