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At least 1,135 records · Page 63Linked to original sources

Lymphangiosarcoma of the edematous thigh after radiation therapy for carcinoma of the vulva.

A 66-year-old patient was treated with external radiation therapy for an advanced carcinoma of the vulva. Seven years later, a lymphangiosarcoma developed in her edematous lower extremity. Lymphangiosarcomas have been reported to occur in postmastectomy patients; however, this is only the third case in a patient with a gynecologic primary malignancy. In anticipation of possible increased use of radiation therapy in vulvar carcinoma, gynecologists should be aware of this rare, highly aggressive neoplasm.

Aged↗

Actinomycosis of the thigh presenting as a soft-tissue neoplasm.

A 14-year-old boy presented with a mass measuring 6 cm x 9 cm, proximal to the patella on the anterior aspect of the knee. Magnetic resonance imaging revealed a 6 x 8 x 4 cm smoothly marginated slightly heterogeneous ellipsoidal mass which displaced musculature, the adjacent cutaneous fat and the quadriceps tendon. At surgery, the mass was noted not to penetrate the superficial surface of the quadriceps tendon and was full of slimy fluid. Histological examination revealed multiple basophilic lobulated granules with homogeneous centres and eosinophilic peripheral clubbed projections. The organisms grown anaerobically were identified as Actinomyces species. The anatomical site of the lesion is very unusual for actinomycosis and the exact route of infection in this patient remains unclear.

Actinomycosis↗

Parosteal lipoma of the thigh with cartilaginous and osseous differentiation: an osteochondrolipoma.

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.

Adipocytes↗