The pathology and surgical treatment of tumors . Fig. 398.—Portion of the spinal cordwith psammoma (after Sutton). SARCOMA. 551 history of all such cases has been one of slow progressive paralysisand death. Regressive Metamorphoses.—The absence of a well-developedreticulum, the great proliferating activity of the cells, and the atypicalvascularization of sarcoma render the tumor liable to early and exten-sive degenerative changes. Fatty degeneration is common, but calci-fication is only observed in psammoma. The granular detritus in fattydegeneration is either absorbed or, by the addition of s
The pathology and surgical treatment of tumors . Fig. 398.—Portion of the spinal cordwith psammoma (after Sutton). SARCOMA. 551 history of all such cases has been one of slow progressive paralysisand death. Regressive Metamorphoses.—The absence of a well-developedreticulum, the great proliferating activity of the cells, and the atypicalvascularization of sarcoma render the tumor liable to early and exten-sive degenerative changes. Fatty degeneration is common, but calci-fication is only observed in psammoma. The granular detritus in fattydegeneration is either absorbed or, by the addition of serum, remainsas a turbid fluid which occupies spaces surrounded by tumor-tissue,forming cysts without a proper cyst-wall. The imperfect development of the walls of blood-vessels is thecause of frequent hemorrhages into the substance of the tumor, wherethe blood either coagulates, is absorbed, or remains in a fluid state. jmKm ? ,-*;-:,T-^/./- X. Fig. degeneration in sarcoma; X 75 (Surgical Clinic, Rush Medical College, Chicago):a, connective-tissue stroma ; i, b, sarcoma-cells ; c, c, c, myxomatous tissue. The staining of the tissues of the tumor in the vicinity of rupturedcapillaries is one of the characteristic features of most of the sarcoma-tous growths. The liability to hemorrhage is increased by the exten-sion of fatty degeneration to the capillary walls. If the hemorrhage iscopious, the tumor-tissue is compressed by the extravasated blood, and 552 PATHOLOGY AND TREATMENT OF TUMORS. a blood-cyst forms, which frequently adds to the difficulty in sudden increase in the size and tension of the tumor should leadto the suspicion that a free hemorrhage has taken place into the sub-stance of the tumor. In subcutaneous sarcomata this accident is oftenannounced a day or two later by discoloration of the skin. Hyalinedegeneration is not as frequently observed in sarcoma as in deg
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectneoplas, bookyear1895
