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  • Title: Parosteal lipoma of the thigh with cartilaginous and osseous differentiation: an osteochondrolipoma.
    Author: Rau T, Soeder S, Olk A, Aigner T.
    Journal: Ann Diagn Pathol; 2006 Oct; 10(5):279-82. PubMed ID: 16979520.
    Abstract:
    Lipomas are very common benign soft tissue neoplasms. They are usually slow-growing and may occur anywhere in the body. Mature cartilage and bone arising in a lipoma is a rare event and is mostly associated with a parosteal localization of the neoplasm. We describe a new case of osteochondrolipoma showing not only major adipocytic differentiation but also areas of fibrocytic and cartilaginous cell differentiation and bone formation (both endochondral and membranous). The occurrence of at least 4 distinct directions of mesenchymal cell differentiation within a benign neoplasia underlines the concept of multilineage differentiation of pluripotent mesenchymal stem cells. Such a multidirectional potential was recently well established in vitro in stem cells present in adult adipocytic tissue.
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