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liangjinjun 离线
原上传者评论:
Phillip McKee - Overseas Consultations (Cave Creek, Arizona, USA) Wrote:
I think that this is a classic cellular neurothekeoma. The packeting is best appreciated in the first low power image. Cutaneous myoepithelioma is extremely rare. In my experience it presents as a diffuse although circumscribed nodule lacking the packeting of cellular neurothekeoma. The infiltrate is somewhat polymorphous and there is stromal myxoid change and/or hyalinization. In any event, immunohistochemistry will resolve any diagnostic difficulty.
谢谢TK1905老师提供这么罕见的病例供我们学习!
形态支持:Cellular
Neurothekeoma(细胞型神经鞘瘤)
细胞型神经鞘瘤(cellular neurilemmoma)罕见,属于良性病变。好发于脊柱旁区域,特别是纵隔、腹膜后、盆腔和骶尾部,其次为颈部和四肢。细胞型神经鞘瘤组织病理特点主要为缺少Verocay小体的Antoni A 区,细胞呈束状结构,瘤细胞核呈卵圆形、圆形、杆状或梭形,可见核尘,有少量正常核分裂象,局部可见部分细胞有轻度的核深染及异形性;肿瘤团块周围少量淋巴细胞及组织细胞浸润。
诊断细胞型神经鞘瘤为良性的主要依据为:①包膜完整,包膜周围或包膜下可见淋巴细胞套;②血管周围淋巴细胞浸润及玻璃样变性;③施万细胞相对核分裂象和不典型细胞增多不成比例;④局限性Antoni B 区结构有时可看到;⑤S-100 蛋白强阳性,CD34 及SMA 阴性。
鉴别诊断:主要是应与低度恶性的恶性周围神经鞘瘤鉴别。