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Experimentally induced synovial sarcoma

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Summary

Synovial sarcoma has been induced in the knee joints of rats by intra-articular injection of 9-10-dimethyl-1-2-benzanthracene. Tumours developed from three to six months after the last injection.

The neoplasms obtained were classified as synovial sarcoma (50%), fibrosarcoma (25%), giant cell sarcoma (15%), malignant fibrous hystiocytoma (10%).

The synovial membrane in the treated knee joints presented a chronic synovitis associated with fibrosis and proliferation of the lining cells.

The primitive tumour spread locally infiltrating muscle and the adjacent bones.

Metastases occurred most frequently to the lungs (70%) and liver (20%); lymph nodes were involved in 10%.

Résumé

Le but de ce travail a été de produire expérimentalement un synovialo-sarcome au niveau de la cavité articulaire du genou chez le rat.

Nous avons employé 50 rats type Wistar: 40 ont été traités avec une substance cancérigène, le 9-10-diméthyl-1-2-benzanthracène (D.M.B.A.) qui a été injectée dans le genou, 10 ont servi de témoins.

Tous les rats traités par le D.M.B.A., sauf un, ont développé une masse tumorale qui a atteint sa plus grande dimension entre trois et six mois. Les tumeurs obtenues ont été classées ainsi: synoviale-sarcome (50%), fibrosarcome (25%), sarcome géant-cellulaire (15%), hystiocytome fibreux malin (10%).

La synoviale des genoux traités par le D.M.B.A. a présenté une inflammation chronique associée à une fibrose et à une prolifération des cellules limitantes.

La tumeur primitive s'est étendue en infiltrant les muscles et les os voisins. Les métastases ont intéressé le plus souvent le poumon (70%) et le foie (20%), les ganglions lymphatiques ont aussi été atteints (10%).

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De Santis, E., Rosa, M.A., Oransky, M. et al. Experimentally induced synovial sarcoma. International Orthopaedics 5, 37–41 (1981). https://doi.org/10.1007/BF00286097

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