CT and MR characteristics of hibernoma: six cases

Dursun, Memduh; Agayev, Ayaz; Bakir, Barış; Özger, Harzem; Eralp, Levent; Şirvancı, Mustafa; Güven, Koray; Tunacı, Mehtap

doi:10.1016/j.clinimag.2007.07.001

Cited by 32 publications

(47 citation statements)

References 15 publications

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“…This matches previous descriptions of intraosseous hibernomas [1,4,5,8,9]. Unlike hibernomas in soft tissue, intraosseous hibernomas do not show marked hyper vascularity of the tissue [3,13].…”

Section: Histology Hibernomasupporting

confidence: 77%

A Rare Sternal Lesion on Magnetic Resonance Mammography Mimicking a Metastasis in a Patient With a History of Mamma Carcinoma: A Case Report

et al. 2017

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A 48-year-old female patient was sent to the radiology department for her annual control magnetic resonance imaging (MRI) after mastectomy for breast cancer. The MRI showed a solitary lesion in the manubrium sterni with homogeneous enhancement. Computed tomography (CT) showed a sclerotic lesion. The lesion showed minimal activity on bone scintigraphy. A biopsy was performed and histology revealed a lesion consisting of brown fat. The lesion was diagnosed as an intraosseous hibernoma. This case report highlights the importance of histologic confirmation of a suspected metastasis, since rare lesions can mimic metastases on imaging.

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Section: Histology Hibernomasupporting

confidence: 77%

A Rare Sternal Lesion on Magnetic Resonance Mammography Mimicking a Metastasis in a Patient With a History of Mamma Carcinoma: A Case Report

et al. 2017

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“…Owing to the tumor's hypervascularity, localized warmth can be depicted over the lesion at palpation [4,6,7,14,15]. The lesions can become symptomatic when compression of nearby structures occurs [6,15].…”

Section: Discussionmentioning

confidence: 99%

“…To the best of author's knowledge only three series [5-7] and several case reports [8-18] have exhibited the imaging characteristics of hibernomas. The present study, being the largest in the imaging of hibernomas, highlights the spectrum of imaging appearances (CT/MRI) of twelve histologically proven cases of hibernomas and stresses the positive impact of imaging in the pre-operative planning when a complex fatty mass is encountered.…”

Section: Introductionmentioning

confidence: 99%

Imaging of hibernomas: A retrospective study on twelve cases

et al. 2011

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BackgroundTo analyze the imaging features of hibernomas on computed tomography (CT) and magnetic resonance (MRI).MethodsTwelve hibernomas were retrospectively assessed with CT and MR imaging and compared to the histology of the specimenResultsNine females and three males with a mean age of 30 years were included. Ten tumors occurred in the thigh and two affected the subcutis of the periscapular and buttock regions. On eight CT scans, seven (87,5%) lesions were homogeneous and mildly to moderately hyperdense compared to subcutaneous fat while one lesion was heterogeneous with mixed hypo and hyperattenuating areas. On six T1W images, five (83,3%) lesions appeared homogeneous and hypointense relative to subcutaneous fat and one was heterogeneous. Incomplete fat suppression was depicted in all cases. All lesions displayed marked enhancement. Large intratumoral vessels were depicted in three of the 12 (25%) cases. Septations were depicted on four of the eight unenhanced CT and on all six MRI examinations.ConclusionsHibernoma usually appears hypodense and hypointense relative to subcutaneous fat on pre-contrast CT and MR T1W with variable enhancement patterns and incomplete fat suppression on STIR or fat-saturated sequences. These characteristics relate directly to the presence of brown fat. However, atypical findings such as heterogeneous patterns of mixed fatty and non fatty components on unenhanced CT and MR T1W can be also encountered. Absence of large intratumoral vessels should not exclude hibernomas from the differential diagnosis of regional lipomatous tumors.

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“…10 The diagnosis is difficult, 4 and rarely by radiography. 1,11 Ultrasonography reveals hibernomas to be uniformly hyperechogenic, whereas angiography shows highly vascularised tumours with occasional arteriovenous shunts. Technetium 99 scintigraphy yields areas of increased uptake.…”

Section: Discussionmentioning

confidence: 99%

“…15 The masses can be hypointense or isointense on T1-weighted images or isointense or hypointense on T2-weighted images (relative to the fat). 11,15 Fatty-suppressed sequences can reveal its vessels. 1,16 The Gadolinium enhancement is particularly intense in areas of low signal.…”

Section: Discussionmentioning

confidence: 99%