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女,42岁 右后背部肿块
灰黄、灰褐结节状组织3.0CM*2.5CM*2.0CM大小,切面灰白、质软。
本例图片采用麦克奥迪MoticBA410显微镜+MoticamPro285A摄像头采集制作。
点评专家:焦宇飞(102楼 链接:>>点击查看<< )
获奖名单:xiaocaodi(22楼 链接:>>点击查看<< )
第一考虑的诊断:(右后背)粒细胞肉瘤(分化型)。
思路:低倍第一印象,中央区广泛的凝固性坏死,周边残留区肿瘤细胞弥漫分布;中高倍印象,肿瘤细胞浆中等、嗜酸,核圆形、卵圆形、杆 状、不规则形,核分裂多;部分区域肿瘤细胞呈血管中心性浸润生长模式提示为淋巴造血系统肿瘤。其中散在成熟的嗜酸性粒细胞和中 性粒细胞具有提示可能是髓系分化的肿瘤。综合起来,考虑为髓系肉瘤,具体为粒细胞肉瘤(分化型)。需要结合临床病人有无白血病 以排除白血病之髓外浸润。
鉴别诊断:(1)部分细胞核偏位深染,浆红,似浆细胞样,部分细胞梭性,胞浆红染,需排除肌源性肉瘤之可能;
(2)弥漫分布,噬血管,其他淋巴造血系统肿瘤要排除;
(3)其他伴有嗜酸性粒细胞背景的肿瘤,如组织细胞增生症、上皮样血管瘤等
免疫组化:MPO、CD15、CD34、CD117、CD99等。
夜深了,该睡了,第一次坐沙发,压力大,等着接受批评,呵呵
诊断:(右后背部肿块)朗格汉斯细胞肉瘤
诊断依据:(1)患者男性,42岁,后背部软组织肿块;
(2)低倍镜下示肿瘤大部分坏死,瘤细胞弥漫性浸润;
(3)周边伴有肌纤维母细胞的反应性增生;部分区域肿瘤细胞围绕血管呈浸润性生长;
(4)高倍镜下示瘤细胞异型性明显,呈圆形及卵圆形,核仁易见。散在分布少量嗜酸性粒细胞,核分裂像较多;
(5)核沟易见。
免疫组化:AE1/AE3、Vimentin、LCA、CD1a、S-100、CD68、CD21、CD23、CD3、CD20、MPO、粒酶B、SMA、Desmin、HMB45、KI-67
鉴别诊断:(1)髓系肉瘤:镜下幼稚的嗜酸性粒细胞弥漫性浸润,免疫组化MPO、粒酶B阳性;
(2)滤泡树突细胞肉瘤:形态类似炎性假瘤,免疫组化FDC的标记物阳性;
(3)肌源性肉瘤:结合免疫组化可以鉴别,不做为首要鉴别诊断;
(4)淋巴造血系统其它肿瘤:除外上述肿瘤后需要补做IHC鉴别
诊断:(右后背部肿块)上皮样肉瘤
诊断依据:(1)患者男性,42岁,后背部软组织肿块;
(2)低倍镜下示肿瘤大部分地图样坏死,瘤细胞弥漫性浸润;高倍镜下示瘤细胞异型性明显,呈圆形及卵圆形,核仁易见。散在分布少量嗜酸性粒细胞,核分裂像较多;
(3)周边伴有肌纤维母细胞的反应性增生;部分区域肿瘤细胞围绕血管呈浸润性生长;
免疫组化:AE1/AE3、Vimentin、LCA、CD1a、S-100、CD68、CD21、CD23、CD3、CD20、MPO、粒酶B、SMA、Desmin、HMB45、KI-67
鉴别诊断:(1)滤泡树突细胞肉瘤:形态类似炎性假瘤,免疫组化FDC的标记物阳性;
(2)梭形细胞癌,
(3)肌源性肉瘤:结合免疫组化可以鉴别,不做为首要鉴别诊断;
(4)淋巴造血系统其它肿瘤:除外上述肿瘤后需要补做IHC鉴别
(5)单向分化滑膜肉瘤。
First, I am just a beginner in pathology. At the same time, I am practicing English. Please do not laugh at me:)
First Impression and pattern recognition: Extensive necrosis and high mitotic index with primitive cytologic features, consistent with small round blue cell tumor? Is there some hint of rossette formation or is it my imagination?
Cytology: The nuclear chromatin is highly open with apparent irregular nuclear membranes and inconspicuous nucleolus. Small to modest amount of eosinophilic cytoplasm are present, while cell borders are poorly defined. Size of the nucleus are variable but more on the side of small.
Background: Some lymphocytes, neutrophils and eosinophils? There is one area with focally increased amount of blood vessels from the background without obvious red cell extravasation. Some small sized vessels were intermingled with tumor cells.
Diagnostic reasoning: Carcinoma and melanoma are unlikely. Lymphoma and sarcoma should be considered.
Myeloid sarcoma, due to cytologic features including open fine chromatin with irregular nuclear membranes, somewhat eosinophilic cytoplasm, and background of neutrophils and eosinophils
Langerhan cell histocytosis or sarcoma, possible but no prominent features of nuclear grooves are present.
Diffuse large B-cell lymphoma: possible but may see bigger nuclear size and more prominent nucleolus.
Anaplastic T-cell lymphoma: possible but no "Hallmark" cells seen
Follicular, interdigitating Dendritic cell sarcoma: possible but would be very unusual pattern.
Lymphoblastic lymphoma (including B, T, and blastic plasmacytoid dendritic cell): possible but nucleus should be more uniform round
List of sarcomas would include
Ewing's/PNET,
Synovial sarcoma,
Rhabdosarcoma,
Round cell liposarcoma,
maybe even MPNST.
Final diagnosis: Poorly differentiated small round blue cell tumor, differential including above entities, favoring myeloid sarcoma.
Would like to do following IHC in the first round: Keratin, EMA, MPO, CD15, CD45, desmin, s100, sma, CD34
Possible in the future: CD23, CD1a, Granzyme B and many others:)
Finally, thank you for the interesting case!!!