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Case Reports
. 2019 Apr 24;7(4):e2142.
doi: 10.1097/GOX.0000000000002142. eCollection 2019 Apr.

Unusual "Dumbbell"-Shaped Hibernoma

Nikolaos Tsapralis  1 , Hien Pham  1 , Apostolos Vlachogiorgos  1 , Vijay Sangar  1 , David Mowatt  1
Affiliations
Case Reports

Unusual "Dumbbell"-Shaped Hibernoma

Nikolaos Tsapralis et al. Plast Reconstr Surg Glob Open. .

Abstract

Hibernoma is considered as a rare soft tissue benign tumor originating from brown fat. Few cases have been described so far in the literature; hibernoma was first described by Merkel in 1906, but it was named by Gery in 1914. We present the case of 33-year-old woman who presented with a palpable lump over superior aspect of her thigh associated with pain. Magnetic resonance imaging examination reported a "dumbbell"-shaped soft tissue tumor involving the right side of the pelvis and adductor compartment passing through the obturator foramen into the adductor compartment infiltrating the hip joint. Clinical and imaging features initially suggested liposarcoma, but ultrasound-guided biopsy and final surgical resection yielded the diagnosis of hibernoma. This rare soft tissue tumor can imitate malignancy, but magnetic resonance imaging and possibly guided biopsy are essential for preoperative planning as surgical resection remains the best management pathway.

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Figures

Fig. 1.
Fig. 1.
MRI scan detailing the unusual hibernoma.
See this image and copyright information in PMC

References

    1. Merkel H. On a pseudolipoma of the breast. Beitr Pathol Anat. 1906;39:152.
    1. Gery L. Discussions. Bull Mem Soc Anat Paris. 1914;89:111.
    1. Fletcher CDM. Fletcher CDM. Soft tissue tumors. In: Diagnostic Histopathology of Tumors. 2002:2nd ed Hong Kong: Churchill Livingstone; 1473.
    1. Grayson JW, Wallace JC. A case report and discussion of hibernomas: pathology, genetics, diagnosis and treatment. Am J Clin Med. 2012;9:151.
    1. Kosem M, Karakok M. Hibernoma: a case report and discussion of rare tumor. Turk J Med Sci. 2001;25:175.

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