Abstract This rare tumor which contains a combination of mesenchymal elements is believed to be the only one of its kind appearing in the orbit. The mesenchymoma has been described in detail by Stout.1,2 These tumors which are derived from mesenchyme appear microscopically to arise from supportive and reticuloendothelial tissues. Stout1 believes that most of the mixed mesenchymal tumors are probably initiated as the result of a developmental fault and so are regarded as dysontogenic growths. He believes that metaplasia plays some part in their development. There has been considerable discussion regarding this tumor, for it demonstrates two tissues arising from basic mesenchyme. The principal one represents a hemangiopericytoma, in which the tumor cells are believed to arise from the pericyte of Zimmerman and lie outside the reticulum sheath of the capillary, differentiating it from the hemangioendothelioma.3 In addition, there appears in this tumor a growth of chondroblastic References 1. Prosthesis with lids, globe, and orbit made by Felix B. Weinberg, 1724 Eutaw Pl, Baltimore, Md, under sponsorship of the Oregon Chapter, American Cancer Society. 2. Stout, A.P.: Mesenchymoma, the Mixed Tumor of Mesenchymal Derivatives , Ann Surg 127:278-290 ( (Feb) ) 1948.Crossref 3. Stout, A.P.: Fibrosarcoma , Cancer 1:30-63 ( (May) ) 1948.Crossref 4. Reeh, M.J.: Treatment of Lid and Epibulbar Tumors , Springfield, Ill: Charles C Thomas, Publisher, 1963. 5. Ackerman, L.V., and Spjut, H.J.: "Tumors of Bone and Cartilage," in AFIP Atlas of Tumor Pathology, 1962, sec 2, pt 4.
Archives of Ophthalmology – American Medical Association
Published: Jan 1, 1966
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