Two extraskeletal myxoid chondrosarcomas arising on the left lower extremity of two women, aged 48 and 72 years, respectively, are reported. One case mimicked clinically an organized hematoma. By light microscopy, they showed a lobular architecture. Anastomosing cords of cells lying in a myxoid background were the histologic hallmark. Based on conventional criteria, they were classified as neoplasms of low (G1) and intermediate (G2) grade malignancy. Both cases were strongly positive for S-100 protein and vimentin. Follow-up confirmed the low aggressiveness of this entity.
BinderS.W., SaidJ.W., ShintakuI.P., PinkusG.S.: A histiocyte specific marker in the diagnosis of malignant fibrous histiocytoma. Use of monoclonal antibody KP-1 (CD-68). Am.J. Clin. Pathol., 97: 759–763, 1992.
4.
CostaJ., WesleyR.A., GlatsteinE., RosenbergS.A.: The grading of soft tissue sarcomas. Results of a clinicopathologic correlation in a series of 163 cases.Cancer, 53: 530–541, 1984.
5.
D'AmbrosioF.G., ShiuM.H., BrennanM.F.: Intrapulmonary presentation of extraskeletal myxoid chondrosarcoma of the extremity. Report of two cases.Cancer, 58: 1144–1148, 1986.
6.
EnzingerF.M., ShirakiM.: Extraskeletal myxoid chondrosarcoma. An analysis of 34 cases.Hum. Pathol., 3: 421–435, 1972.
7.
EnzingerF.M., WeissS.W.: Soft Tissue Tumors, 2nd ed., pp. 866–874, CV Mosby Co., St. Louis, 1988.
8.
FletcherC.D.M., PowellG., McKeeP.H.: Extraskeletal myxoid chondrosarcoma: A histochemical and immunohistochemical study.Histopathology, 10: 489–499, 1986.
9.
FukudaT., IshikawaH., OhnishiV.: Extraskeletal myxoid chondrosarcoma arising from the retroperitoneum.Am. J. Clin. Pathol., 85: 514–519, 1986.
10.
GoetzS.P., RobinsonR.A., LandasS.K.: Extraskeletal myxoid chondrosarcoma of the pleura. Report of a case clinically simulating mesothelioma.Am. J. Clin. Pathol., 97: 498–502, 1992.
11.
HachitandaY., TsuneyoshiM., DaimaruY., EnjojiM., NakagawaraA., IkedaK., SueishiK.: Extraskeletal myxoid chondrosarcoma in young children.Cancer, 61: 2521–2526, 1988.
12.
KindblomL.G., AngervallL.: Myxoid chondrosarcoma of the synovial tissue.Cancer, 52: 1886–1895, 1983.
13.
KlijianenkoJ., MiceauC., CoteR., FlamantF., CaillaudJ.M.: Unusual extraskeletal myxoid chondrosarcoma in a child.Histopathology, 16: 196–198, 1990.
14.
LattesR.: Tumors of the Soft Tissues, 2nd series, fascicle 1 (revised), pp. 215–216, Armed Forces Institute of Pathology, Washington D.C.,1982.
15.
MehioA.R., FerenczyA.: Extraskeletal myxoid chondrosarcoma with « chordoid » features (chordoid sarcoma). Am.J. Clin. Pathol., 70: 700–705, 1978.
16.
SalehG., EvansH.L., RoJ.Y., AyalaA.G.: Extraskeletal myxoid chondrosarcoma. A clinicopathologic study of ten patients with long-term follow-up.Cancer, 70: 2827–2830, 1992.
17.
SteffenC.M., KennedyP.J., PageJ., DanM.: An extraskeletal chondrosarcoma arising in the brachial plexus.J. Surg. Oncol., 50: 58–61, 1992.
18.
SuzukiT., KanekoH., KojimaK., TakatohM., HasebeK.I.: Extraskeletal myxoid chondrosarcoma characterized by microtubular aggregates in the rough endoplasmic reticulum and tubulin immunoreactivity.J. Pathol., 156: 51–57, 1988.
19.
VassarP.S.: Chondrosarcoma of the tongue.Arch. Pathol., 65: 261–262, 1957.
WilkinsonA., BeckfordM., BabinR.W., FarhamD.M.: Extraskeletal myxoid chondrosarcoma of the epiglottis. Case report and review of the literature.Otolaryngol. Head Neck Surg., 104: 257–260, 1991.