Parosteal Lipoma of the Fibula

Bui-Mansfield, Liem T.; Myers, Cris P.; Chew, Felix S.

doi:10.2214/ajr.174.6.1741698

Cited by 13 publications

(10 citation statements)

References 5 publications

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“…6 Intraosseous, cortical or parosteal lipomas have been described based on their relation to the parent bones. [7][8][9] To the best of our knowledge, this is the second case of parosteal lipoma of the mandible documented in English-language literature, with the other case reported by Steiner in 1981. 10 The parosteal lipoma exhibits a contiguous relationship with the periosteum and usually demonstrates some form of attachment to the periosteum with Ossifying parosteal lipoma of the mandible underlying osseous reaction.…”

Section: Discussionmentioning

confidence: 99%

“…10 The parosteal lipoma exhibits a contiguous relationship with the periosteum and usually demonstrates some form of attachment to the periosteum with Ossifying parosteal lipoma of the mandible underlying osseous reaction. [7][8][9][10] Parosteal lipoma may rest directly on the cortex with or without cartilage or bone elements inside. Approximately 60% of all parosteal lipomas had definite bony alterations of the parent bones.…”

Section: Discussionmentioning

confidence: 99%

“…Ossification or reactive processes such as bony hyperostosis, protuberance, erosion and compressive changes may be present. 7,11 Branch-like or linear cortical protuberances and ossification are frequently seen. Cortical depression, thickening, undulation or smooth erosion may also be present.…”

Section: Discussionmentioning

confidence: 99%

“…Aggressive bone destruction is consistently absent. 7 Clinically parosteal lipomas are usually asymptomatic lesions but motor or sensory function deficits may be caused if nerve bundles are compressed by the lesions. [12][13][14] Occasional numbness of the lower lip had been noted by the patient in the present case, which may be due to the compression and displacement of the mental nerve caused by tumour expansion.…”

Section: Discussionmentioning

confidence: 99%

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Ossifying parosteal lipoma of the mandible: a case report and review of the literature

Sun¹,

Sun²,

Zhang³

et al. 2013

Dentomaxillofacial Radiology

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Parosteal lipoma is an unusual kind of lipoma and occurs in intimate association with the underlying periostium of the bone. Parosteal lipomas mostly affect the long bones and involvement of the mandible is rare. We report a case of ossifying parosteal lipoma of the mandible in which CT was effective in diagnosis and showed a well-circumscribed mass of fat attenuation containing areas of ossification and branch-like bony protuberances from adjacent cortical bone. Microscopic examination revealed that the mass was composed of mature fat cells without nuclear hyperchromasia or atypia. Layers of bone and ossification were found inside. Although rare, it should be considered as a differential diagnosis of teratoma, osteochondroma and osteosarcoma. Dentomaxillofacial Radiology ( Keywords: lipoma; mandible; pathology; computed tomography Case reportHistory and clinical examination A 48-year-old male was referred to our hospital because of a slow-growing mass on his chin which had been present for at least 20 years with associated occasional numbness of the right lower lip. The patient's general health was good and no other remarkable medical history could be elicited.A mass of approximately 86665 cm in dimension was palpable beneath the skin of the chin and mental areas extending bilaterally to the buccal areas. The mass was soft, non-tender and fixed to the mandible. No prominent swelling, hyperaemia or ulceration of the skin was seen. No mouth opening difficulty was noted. Intraoral examination showed that the buccogingival sulcus was shallower and the mucosa was intact. No prominent loosening of the mandibular teeth was noted. Radiographic examinationA panoramic radiograph failed to find any major bony changes of the mandible. CT revealed a broad-based, well-demarcated mass with fat attenuation beneath the skin (Figure 1a). Areas of ossification were prominent inside the mass (Figure 1b). Exophytic osseous protuberance and branch-like periosteal thickening from the underlying symphysis of the mandible were identified (Figure 1a,c). The cortical bone was uneven and was locally infiltrated or depressed. The marrow space of the mandible was not contiguous with the lesion and sclerosis of the trabeculae was seen. Surgical treatmentEn bloc resection of the mass together with the osseous protuberance from the mandible was performed. The mass was well circumscribed and was easily dissected from the adjacent soft tissue. The base of the tumour adhered strongly to the underlying mandible. The mass measured 76565 cm and was well encapsulated by a thin, fibrous membrane. The cut surface of the specimen was yellowish with a mostly homogeneous appearance. Hard bony protuberance from the underlying mandible was chiselled and the bone was shaped.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Ossifying parosteal lipoma of the mandible: a case report and review of the literature

Sun¹,

Sun²,

Zhang³

et al. 2013

Dentomaxillofacial Radiology

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“…Patients range in age from 40 to 60 years and usually present with a history of a slowly growing, large, painless mass or less commonly with a compressive neuropathy [15,16]. The tumor commonly arises in the metaphyses of the femur and in the upper extremity [16].…”

Section: Lipogenic Tumorsmentioning

confidence: 99%

Surface primary bone tumors: Systematic approach and differential diagnosis

et al. 2015

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Surface primary bone tumors may appear similar to their intramedullary counterpart, but because they are rare, they may pose diagnostic challenges when showing different characteristics compared to their intramedullary counterpart. It is important for radiologists to recognize the imaging findings for various uncommon surface primary bone tumors, which may help to reduce the differential diagnosis or to lead to a specific diagnosis. Radiography is typically used for first-line imaging. If necessary, it is followed by CT or MRI for evaluation and characterization of surface bone tumors. The aim of this article is to review the imaging findings and differential diagnosis for surface primary bone tumors.

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Painless mass in leg: diagnosis and discussion

et al. 2009

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Parosteal ossifying lipoma of the fibula: a case of benign lipomatous tumor showing gadolinium enhancement on MRI. Discussion Radiography shows a well-defined, calcified parosteal softtissue mass with fat density and calcification, apparently attached to the fibular cortex. Computed tomography shows both mass components (calcium and fat), well-delimited edges and the cortical relationship with a short narrow pedicle. Magnetic resonance imaging with a gadoliniumenhanced dynamic three-dimensional axial sequence shows inhomogeneity with fat-saturated low signal areas and foci of enhancement in non-fatty areas.

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Parosteal Lipoma of the Fibula

Cited by 13 publications

References 5 publications

Ossifying parosteal lipoma of the mandible: a case report and review of the literature

Ossifying parosteal lipoma of the mandible: a case report and review of the literature

Surface primary bone tumors: Systematic approach and differential diagnosis

Painless mass in leg: diagnosis and discussion

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