A Giant Parosteal Lipoma with Exostosis of the Right Proximal Humerus
Case Report | Volume 5 | Issue 2 | JBST May – August 2019 | Page 4-7| Abdaud Rasyid, Mujaddid Idulhaq, Pamudji Utomo, Ambar Mudigdo, Handry Tri Handojo. DOI: 10.13107/jbst.2019.v05i02.424
Author Abdaud Rasyid,, Mujaddid Idulhaq,, Pamudji Utomo,, Ambar Mudigdo, Handry Tri Handojo
Department of Orthopaedic and Traumatology, Faculty of Medicine, Sebelas Maret University, Surakarta, Indonesia,
Department of Orthopaedic and Traumatology, Prof. DR. R. Soeharso Orthopaedic Hospital, Surakarta, Indonesia,
Department of Anatomical Pathology, Sebelas Maret University, Surakarta, Indonesia,
Department of Radiology, at Prof. DR. R. Soeharso Orthopaedic, Hospital, Surakarta, Indonesia.
Address of Correspondence
Dr. Abdaud Rasyid,
Jalan Ahmad Yani, Pabelan, Kartasura, Sukoharjo, Jawa Tengah, 57162, Indonesia.
Introduction: Lipomas are the most frequent benign soft-tissue tumors. Soft -tissue lipomas are categorized by anatomic location as either superficial (subcutaneous) or deep (intermuscular). Deep lipomas can be located in any part of the body, including the superior extremities. Lipomas typically reach a diameter of several centimeters and are localized in a single anatomical region. Parosteal lipoma is a rare subtype of deep lipoma that has a broad attachment to the underlying periosteum that forms an exostoses-like bone prominence. There has been no reliable literature; about two pathological processes occur in one extremity at the same time.
Case Presentation: A 49-years -old female presented at our institution with a painless, slow -growing lump in her right shoulder region since for 2 years ago, with no other symptoms, and no history of trauma. A palpable non-tender mobile mass was present on the right shoulder region. Plain radiographs showed a well-delineated ovoid radiolucent lesion and a radiopaque lesion over the right proximal humerus. The fine -needle biopsy result suggested a liposarcoma. Wide-excision surgery was performed for both the masses. On contrary, the histological examination of the specimen confirmed a giant lipoma with pieces of adult bone tissues.
Conclusion: Deep-seated lipomas are most commonly discovered in men between the ages of thirties 30s and sixties60s. In our patient, the lipoma also accompanied with an exostoses-like cartilaginous mass over the proximal humerus as in parosteal lipoma. Plain radiographs study of parosteal lipoma is associated with a false osteochondroma appearance, which also found in this patient. Histological examination suggested a giant lipoma for this patient, but the possibility of two pathological processes is still in question.
Keywords: Giant lipoma, shoulder, exostosis, surgery.
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|How to Cite this article: Rasyid A, Idulhaq M, Utomo P, Mudigdo A, Handojo H T. A Giant Parosteal Lipoma with Exostosis of the Right Proximal Humerus. Journal of Bone and Soft Tissue Tumors May-August 2019;5(2): 4-7.|
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