Osteolipoma Arising Adjacent to the Sternoclavicular Joint.

Yabe, Yutaka; Kumagai, Jun; Koizumi, Noriyuki; Kawamura, Masanori; Ono, Sadahide; Hatori, Masahito

doi:10.3109/2000-1967-049

Cited by 8 publications

(13 citation statements)

References 16 publications

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“…Simple lipomas have been described as showing homogeneous signal intensities that are identical to subcutaneous fat on all MR pulse sequences, with a complete loss of signal following fat suppression (11). Ossification, calcification and fibrous connective tissue appear as low signal intensity areas on all MR pulse sequences (10,12). In the present case, however, it was difficult to detect and evaluate the peripheral ossifications using MRI.…”

Section: Discussionmentioning

confidence: 98%

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Scapular osteochondrolipoma: Imaging features with pathological correlation

et al. 2013

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Osteochondrolipoma is an extremely rare histological variant of lipoma with osseous and cartilaginous differentiation. The present study reports an unusual case of an osteochondrolipoma occurring in the left scapular region of a 49-year-old male. The physical examination revealed a 3-cm, hard, non-tender and minimally mobile mass. Plain radiography revealed a faintly ossified soft-tissue mass without evidence of bone erosion. Computed tomography (CT) confirmed the presence of a lesion and the normal appearance of the scapula. Magnetic resonance imaging (MRI) showed a well-circumscribed subcutaneous mass with an almost homogeneous high signal intensity on the T1- and T2-weighted sequences. Contrast-enhanced fat-suppressed T1-weighted sequences demonstrated a faint peripheral and septal enhancement of the mass. A marginal excision of the tumor was performed. Histologically, the tumor was predominantly composed of mature adipocytes mixed with thin trabeculae of mature bone. In addition, small amounts of mature hyaline cartilage and osteoid were identified in the periphery of the lesion. Based on these findings, the tumor was diagnosed as an osteochondrolipoma. The patient demonstrated no evidence of local recurrence within six months of follow-up. Although rare, osteochondrolipoma should be considered as a differential diagnosis of a well-defined, calcified/ossified, subcutaneous mass in the scapular region.

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Section: Discussionmentioning

confidence: 98%

“…CT is of great value in the evaluation of osteochondrolipoma (10). The procedure is useful for documenting the presence of fatty and osseous elements.…”

Section: Discussionmentioning

confidence: 99%

Scapular osteochondrolipoma: Imaging features with pathological correlation

et al. 2013

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“…Most of them connected with bone (inside a bone or adjacent to bone) [4,6,9]. They are intraosseous lipoma, parosteal or periosteal lipoma.…”

Section: Discussionmentioning

confidence: 99%

Osteolipoma independent of bone tissue: a case report

Demiralp

Alderete

Köse

et al. 2009

Cases J

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IntroductionLipomas are the most common benign soft tissue tumors and appear in any part of the body. They typically consist of mature adipose tissue. Osteolipoma is an extremely rare histologic variant of lipoma that contains mature lamellar bone within the tumor and osteolipoma independent of bone tissue are very rare. We report a case of histologically confirmed osteolipoma independent of bone located in the thigh.Case presentationA 47-year-old male presented with a progressively enlarging, painful mass which approximately 10 cm × 8 cm over the anteromedial aspect of his right thigh. Plain films, Computerized Tomography, Magnetic Resonance Imaging and ultrasound guided needle biopsy were performed. Given the benign imaging characteristics and fine needle aspiration, an excisional biopsy was undertaken. The definitive pathologic diagnosis was intramuscular osteolipoma without evidence of malignancy. No recurrence was observed after 18 months follow up.ConclusionAlthough ossifying lipomas are very rare, it is important to keep them in mind when a lesion with adipose tissue in combination with ossification is encountered.

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“…In the case of osteolipoma previously mentioned, there was no clear continuity between the frontal bone and the bone components in the tumor, as also seen in previous cases of osteolipoma that was not in contact with bone. 3,4,9,10,12 Because ASCs were found in lipoma and there are subtypes of lipoma such as angiolipoma and cartilaginous lipoma, 19 the hypothesis that multipotent ASCs are differentiated to bone tissues in response to growth signals in osteolipomas seems to be most likely.…”

Section: Discussionmentioning

confidence: 99%

Osteolipoma in the Glabella

Makiguchi¹,

Terashi²,

Hashikawa³

et al. 2013

Journal of Craniofacial Surgery

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Lipoma is a benign tumor that often arises in the craniomaxillofacial region. Osteolipoma containing bone tissue is very rare and the developmental mechanism is unclear. Mesenchymal stem cells in adipose tissue that have potential to differentiate into fat, bone, cartilage, and vascular components may be involved in the development of osteolipoma, in which adipose and bone tissues coexist. We encountered a patient with osteolipoma that arose in the glabella. We describe the case and the results of an investigation of the presence in lipomas of mesenchymal stem cells with differentiation potential similar to that of normal adipose cells. The patient was a 66-year-old woman. Histopathologically, bone tissue surrounded by fibrous connective tissue was present in the nodular adipose tissue and was diagnosed as osteolipoma. Mesenchymal stem cells were collected by collagenase treatment of lipoma tissue, and their potential to differentiate into fat, bone, and cartilage was shown. On the basis of this study, we suggest that lipoma-derived mesenchymal stem cells are the basis of the pathogenesis of osteolipoma. The conditions that induce differentiation of mesenchymal stem cells into bone remain to be investigated.

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Osteolipoma Arising Adjacent to the Sternoclavicular Joint.

Cited by 8 publications

References 16 publications

Scapular osteochondrolipoma: Imaging features with pathological correlation

Scapular osteochondrolipoma: Imaging features with pathological correlation

Osteolipoma independent of bone tissue: a case report

Osteolipoma in the Glabella

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