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此病例是非常特殊,其表现为:
1)ALCL很少原发于骨组织,
2)肿瘤细胞免疫表型特殊, CD30+CD15+ALK-1+CD43+Perforin+, 而其他PanB细胞和PanT细胞的标记均为阴性。
3)楼主诊断ALCL主要根据是 ALK-1+, 很有说服力!
问题:
1)如何解释ALCL表达 CD15?
2)除了ALK-1+支持ALCL外, 还有那些是支持ALCL的病理诊断线索(包括形态学和 IHC标记)?
感谢分享!
谢谢金主任指教!
关于第一个问题,请看文献摘要:
IMPATH Inc., New York, NY 10019, USA. wojciech.gorczyca@impath.com The characteristic histologic features and immunophenotype are usually diagnostic and allow distinguishing CD30 positive T-cell lymphoma (including anaplastic large cell lymphoma) from classical Hodgkin's lymphoma. The latter differs by expression of CD15 and lack of CD45, pan-T antigens and ALK expression. We report nine cases of large cell hematopoietic neoplasms in which the neoplastic cells co-expressed CD30 and CD15, and had immunophenotypic and morphologic features of T-cell lymphoproliferative process. The average age of the CD15-positive group was 61.9 years; 6 cases occurred in men and 3 in women. The tumors were located in lymph nodes in 8 cases, and in liver in 1 case. Two cases expressed ALK protein. There were no statistically significant differences in phenotypic parameters between the CD15-positive and CD15-negative neoplasms (p>0.05). However, the CD15-positive group appeared to show a minor trend toward less positivity for EMA (44% versus 72%), ALK protein (22% versus 51%), and CD45RO (33.3% versus 83.3%, p=0.07), when compared to the typical CD15-negative neoplasms. In summary, although the co-expression of CD30 and CD15is typical for classical HL, it may be also present in a subset of peripheral T-cell neoplasms including ALK-positive anaplastic large cell lymphoma. Combined and sensible use of morphology and a broad immunophenotypic panel in cases with limited material and/or those with overlapping histologic patterns will best discriminate between HL and ALCL. It is incumbent upon the pathologist to distinguish between these two clinicopathologic entities, since treatment options and clinical outcomes differ. 本例特殊之处在于,本例ALCL同时表达了ALK和CD15,这还是非常少见的,但是ALK在HL中的表达更少见。CD30-positive T-cell lymphomas co-expressing CD15: an immunohistochemical analysis.
Source
Abstract
此病例是非常特殊,其表现为:
1)ALCL很少原发于骨组织,
2)肿瘤细胞免疫表型特殊, CD30+CD15+ALK-1+CD43+Perforin+, 而其他PanB细胞和PanT细胞的标记均为阴性。
3)楼主诊断ALCL主要根据是 ALK-1+, 很有说服力!
问题:
1)如何解释ALCL表达 CD15?
2)除了ALK-1+支持ALCL外, 还有那些是支持ALCL的病理诊断线索(包括形态学和 IHC标记)?
感谢分享!
关于第二个问题:
本例是大细胞病变;本例出现了“裸”免疫表型,这可在ALCL中出现;本例perforin阳性,支持是细胞毒性的大细胞淋巴瘤;大细胞同时表达CD30/CD15/ALK/细胞毒标志物,据目前文献报道,只有ALCL能解释;EBER阴性;临床影像学提示为溶骨性病变。。。
欢迎大家补充!
非常感谢金主任,抛砖引玉式的精彩剖析!
本例患者未查见淋巴结肿大,无肝脾肿大。其余标记物:大细胞显示CD2,CD3,CD4,CD8,CD5,EMA,TIA-1,GranB, oct, Bob1, EBER均阴性。
阳性的有CD30,CD15,CD43,ALK,perforin。
最终诊断为:ALK阳性的间变性大细胞淋巴瘤,淋巴组织细胞变异型。
拿出来的目的:本例始发于骨骼,临床提示脓肿或骨髓瘤,ALK阳性但EMA阴性,细胞毒只有一个标记阳性,本例CD4不阳性。因为CD30和CD15均有非肿瘤细胞阳性的情况,所以对于这个骨骼病例,细胞少而退变,因此最初没有信心诊断,但ALK一般不在非肿瘤细胞内阳性表达,所以最终还是诊断了ALCL。
chenliu0552 离线
chenliu0552 离线
这么有意思的病例,根据老师上述指点,临时学习一下WHO,咱小兵也来凑凑热闹.
1. 支持CHL的方面: 本例CD15和D30,尤其是前者的表达强烈支持霍奇金淋巴瘤CHL,但似乎也不能完全排除ALCL;EMA-也支持CHL;
2. 支持ALCL的方面: 但CHL一般有更好的PAX5-表达;CHL的CD68一般不表达,而ALCL的KP1可以+但PGM1多-;CD3+细胞不多,可能是肿瘤细胞缺失了CD3的表达,如果再有CD5,CD4的结果就更好了;
3. 其他标记:如ALK, EBER, Oct-2, Bob-1, CD4,KP1,PGM1, ganzymeB, MUM1等对诊断也有帮助,另外也需考虑其他疾病。
感谢fangg老师提供好的病例,如果方便,还请继续提供更多信息。也请XLJin8 老师和其他专家关注本例病变,多多指点。