在腔外PEL的病例中存在一些可能导致误诊的病理特征包括经典型霍奇金淋巴瘤样特征，淋巴结窦受累和T细胞抗原的表达。
Potentially misleading pathologic features in our series of extracavitary PEL included classic Hodgkin lymphoma-like features, lymph node sinus involvement, and T-cell antigen expression.
此区由炎症成分围成环状，这些成分包括上皮样细胞，淋巴细胞，成纤维细胞。
This area is ringed by the inflammatory component with epithelioid cells, lymphocytes, and fibroblasts.
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