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有些来自间叶组织的良性瘤样病变,多数位于体表浅层(皮肤,皮下及筋膜)。其细胞增生活跃,常出现不同程度的异型和核分裂象,构成肉瘤样的组织图象,加上生长迅速,切除后容易再发,常被误诊为肉瘤。其实这些病变经过一段较快生长时期后,大多停止生长,不再增大,甚至自然消退,不发生转移,预后良好,因此不是真正的肉瘤,而称之为假肉瘤性病变。例如纤维瘤病因其细胞丰富且异型,易误诊为纤维肉瘤;结节性筋膜炎因其易误诊为肉瘤而有假肉瘤性筋膜炎之称;增生性肌炎因其细胞丰富和畸形巨细胞而易误诊为肉瘤;骨化性肌炎因其富于细胞和骨样组织而易误诊为骨肉瘤;又如活跃的修
Some are benign lesions of the mesenchymal tissue, most of which are located on the superficial surface (skin, subcutaneous and fascia). The cell hyperplasia is active, often with different degrees of heterotypic and mitotic figures, constitute a sarcomatoid tissue image, coupled with rapid growth, recurrence after resection, often misdiagnosed as sarcoma. In fact, after a period of rapid growth, these lesions mostly stop growing, no longer increase, and even subside naturally, do not metastasize, and have a good prognosis. Therefore, these lesions are not true sarcomas but are called pseudosarcomatous lesions. For example, fibroid disease due to its rich cells and heterogeneous, often misdiagnosed as fibrosarcoma; nodular fasciitis because it is often misdiagnosed as sarcoma and false sarcoma fasciitis; hypertrophic myositis due to its rich cells and deformed giant The cells are often misdiagnosed as sarcomas; myositis ossificans are often misdiagnosed as osteosarcomas because they are rich in cells and bone-like tissue;