组织病理学检查示肿瘤呈分叶状增生，与表皮相连，主要由向外毛根鞘分化的鳞状上皮组成，周边基底细胞排列成栅栏状。
They were mainly consisted of epithelia differentiated towards cells of the outer root sheath, and the peripheral basal cells of the tumor lobules showed palisading arrangement.
叶状肿瘤肿瘤细胞的组织学起源是导管周围成纤维细胞。
Neoplastic cells of PT are probably derived from periductal fibroblast according to the ultrastructure characters.
是一种分叶状血管病变，由薄壁血窦组成，其内没有正常的神经组织。
Vascular lesion with lobulated, thin sinusoidal vascular channels and no interspersed normal neural tissue.
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