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Tough case. Need more history/imaging studies and IHC markers. Need to rule out carcinoma (include neuroendocrine carcinoma), malignant melanoma and mesothelioma (less likely). Possible primary sites include breast, lungs, ovaries, upper GI tract, etc., and skin (melanoma). Need to think about malignant neuroendocrine carcinomas from thyroid, parathyroid gland, pancreas and adrenal glands. Do not favor lymphoma or soft tissue sarcoma (although some epithelioid sarcomas like to metastasize to lymph nodes). Very grim and bad prognosis.
本例有多种形态改变,如细胞异型性大、有明显核仁、有的印戒样、有巨核细胞及上皮样细胞,鞋钉细胞可能是出血坏死后的残留,如腺泡状横纹肌肉瘤样等。非常同意大家的意见,要做各种免疫组化,排除各种癌和肉瘤。目前有点四不像,所以个人感觉,最大的可能是转移性恶性黑色素瘤,即使HMB-45有时不阳性。
snowman103cn 离线
患者,女,49岁,体检发现肺部占位1周。胸部及上腹部CT示双肺多发结节,考虑转移;纵隔内、双肺门、腹腔内、腹膜后多发肿大淋巴结,考虑转移;脾大。
肺穿刺活检,低倍镜示肿瘤细胞呈实性片状、条索状或散在性分布,局部区域可见乳头状结构、腺样结构,其中腺样结构内可见“鞋钉”样细胞,个别腺腔内可见红细胞,部分区域可见出血、炎细胞浸润,肿瘤细胞间可见嗜酸性玻璃样变样物质;高倍镜示肿瘤细胞之间的界限不清,胞浆嗜伊红,散在的肿瘤细胞显示胞浆并不是很丰富;部分细胞似乎形成了胞质内管腔,内含红细胞;细胞核圆形或卵圆形,大小不一,部分细胞核深染,核膜不规则;部分细胞核呈泡状,染色质粗颗粒状,核膜增厚、不规则,可见明显的、较大的红核仁;偶见核内包涵体,未见明确的核分裂像。
结合临床资料及镜下特征,本例考虑为转移性肿瘤,诊断方向主要为:
(肺穿刺活检) 1、上皮样血管肉瘤;
2、无色素性黑色素瘤;
3、低分化癌。
明确诊断还需要进一步的免疫组化检查,包括CD31、CD34、8因子、S-100、HMB-45、Melan A、Ki-67、CK等。期待各位老师、同行的进一步详解!!!
Tough case. Need more history/imaging studies and IHC markers. Need to rule out carcinoma (include neuroendocrine carcinoma), malignant melanoma and mesothelioma (less likely). Possible primary sites include breast, lungs, ovaries, upper GI tract, etc., and skin (melanoma). Need to think about malignant neuroendocrine carcinomas from thyroid, parathyroid gland, pancreas and adrenal glands. Do not favor lymphoma or soft tissue sarcoma (although some epithelioid sarcomas like to metastasize to lymph nodes). Very grim and bad prognosis.
依据: 1.女性49;
2.可见乳头状及假乳头状结构、出血区,乳头表面立方状细胞。细胞异型性明显,可见明显红核仁和核内包涵体,浆丰富红染,核分裂可见。
3.CT提示多发病灶,考虑转移性可能性大。
诊断:1.转移性卵巢浆液性乳头状癌。需检查盆腔脏是否有异常。做免疫组化P53、CA125等
2.转移性消化道腺癌,需做CK20等。
3.转移性胰腺癌。
4.恶性间皮瘤。
5.黑色素瘤。
6.上皮样血管内皮细胞瘤。