Monnclonal antibody HMB-45 was previously thought to be melanoma specific antibody and was taken recently as a marker for melanocyte proliferation or activation. A single UV-irradiation system which may induce a funct...Monnclonal antibody HMB-45 was previously thought to be melanoma specific antibody and was taken recently as a marker for melanocyte proliferation or activation. A single UV-irradiation system which may induce a functional activity change in melanocytes was used to test the irradiated epidermal melanocyte for expression of HMB-45.Melanocytes, in the epidermis of the biopsies taken 7 days after a single UV exposure, showed markedly stained HMB-45,accompanied by morphological changes such as enlarged size,rich cytoplasma and elongated dendrites. We conclude that since morphological changes in irradiated melanocytes may be interpreted as signs of functional activity changes, melanocytes are exposed to sthnulatory factors induced by UV light and get into a functional activating state to produce melanosome and HMB-45 antigen. Besides, the presence of HMB-45 in a single UV exposed epidermal melanocyte may support the hypothesis that its expression is inducible and is closely related to the functional activity展开更多
We tested a variety of fixed embedded sections of malignant tumors with HMB-45 MoAband S-100 polyclonal antibody.The results showed that RMB-45 was a highly sensitive and specificantibody for recongnizing melanoma on ...We tested a variety of fixed embedded sections of malignant tumors with HMB-45 MoAband S-100 polyclonal antibody.The results showed that RMB-45 was a highly sensitive and specificantibody for recongnizing melanoma on fixed paraffin-embedded tissue sections, it reacted with 96.6percent of melanomas tested(all primary and 6 of 7 metastatic lesions)Both pigmented and nonpigmeated melanomas were recongnized.Malignant tumors of epithelial,lymphoid and mesenchymal origin were all negative.Although antibody to S-100 protien quite sensitive,it was not melanome-specific and it reached with all melanomas including the one metastatic melanoma that did not react withHMB-45,it we also positive in one of five lymphomas and one of three sarcomas.AdditionallyHMB-45 reacted with junctional nevi and componentes of compound neai and not with intradermalnevi and the dermal components of compound nevi.展开更多
患者女，22岁。头痛头晕近1年入院，在他院诊断为高血压，给予降压治疗，效果不佳，故来我院就诊。查体：血压160／100 mmHg，血钾：3．0 mmol／L。彩超及CT 提示右肾下级有一类圆形肿物，大小3．0 cm ×2．8 cm ×2．0 cm。术...患者女，22岁。头痛头晕近1年入院，在他院诊断为高血压，给予降压治疗，效果不佳，故来我院就诊。查体：血压160／100 mmHg，血钾：3．0 mmol／L。彩超及CT 提示右肾下级有一类圆形肿物，大小3．0 cm ×2．8 cm ×2．0 cm。术前诊断：右肾肿瘤。在全麻下行右肾部分切除术，术中所见：肿物位于右肾下级，行部分肾脏切除术。病理检查：楔形切除肾脏组织，肾被膜完整光滑，切面见一肿物，大小3．2 cm ×2．8 cm ×2．0 cm，肿物包膜完整，切面灰黄灰红色，质地中等，略软，紧临肾被膜。镜下见：肿瘤细胞巢状或片状分布，富于血管，部分区域可见血管外皮瘤样结构，肿瘤细胞小圆形或多边形，部分呈浆细胞样，细胞质内可见嗜酸性颗粒性物质，核异形性及多形性不明显，可见小核仁，核分裂象罕见。免疫组化提示：CK （－），EMA （－），CK7（－），HMB-45（－）， CD34（＋），Actin 灶（＋），calponin （＋）， vimentin（＋）。特殊染色：PAS（＋），网染：肿瘤细胞周围（＋）。病理诊断：（右）肾球旁器细胞瘤。展开更多
文摘Monnclonal antibody HMB-45 was previously thought to be melanoma specific antibody and was taken recently as a marker for melanocyte proliferation or activation. A single UV-irradiation system which may induce a functional activity change in melanocytes was used to test the irradiated epidermal melanocyte for expression of HMB-45.Melanocytes, in the epidermis of the biopsies taken 7 days after a single UV exposure, showed markedly stained HMB-45,accompanied by morphological changes such as enlarged size,rich cytoplasma and elongated dendrites. We conclude that since morphological changes in irradiated melanocytes may be interpreted as signs of functional activity changes, melanocytes are exposed to sthnulatory factors induced by UV light and get into a functional activating state to produce melanosome and HMB-45 antigen. Besides, the presence of HMB-45 in a single UV exposed epidermal melanocyte may support the hypothesis that its expression is inducible and is closely related to the functional activity
文摘We tested a variety of fixed embedded sections of malignant tumors with HMB-45 MoAband S-100 polyclonal antibody.The results showed that RMB-45 was a highly sensitive and specificantibody for recongnizing melanoma on fixed paraffin-embedded tissue sections, it reacted with 96.6percent of melanomas tested(all primary and 6 of 7 metastatic lesions)Both pigmented and nonpigmeated melanomas were recongnized.Malignant tumors of epithelial,lymphoid and mesenchymal origin were all negative.Although antibody to S-100 protien quite sensitive,it was not melanome-specific and it reached with all melanomas including the one metastatic melanoma that did not react withHMB-45,it we also positive in one of five lymphomas and one of three sarcomas.AdditionallyHMB-45 reacted with junctional nevi and componentes of compound neai and not with intradermalnevi and the dermal components of compound nevi.
文摘患者女，22岁。头痛头晕近1年入院，在他院诊断为高血压，给予降压治疗，效果不佳，故来我院就诊。查体：血压160／100 mmHg，血钾：3．0 mmol／L。彩超及CT 提示右肾下级有一类圆形肿物，大小3．0 cm ×2．8 cm ×2．0 cm。术前诊断：右肾肿瘤。在全麻下行右肾部分切除术，术中所见：肿物位于右肾下级，行部分肾脏切除术。病理检查：楔形切除肾脏组织，肾被膜完整光滑，切面见一肿物，大小3．2 cm ×2．8 cm ×2．0 cm，肿物包膜完整，切面灰黄灰红色，质地中等，略软，紧临肾被膜。镜下见：肿瘤细胞巢状或片状分布，富于血管，部分区域可见血管外皮瘤样结构，肿瘤细胞小圆形或多边形，部分呈浆细胞样，细胞质内可见嗜酸性颗粒性物质，核异形性及多形性不明显，可见小核仁，核分裂象罕见。免疫组化提示：CK （－），EMA （－），CK7（－），HMB-45（－）， CD34（＋），Actin 灶（＋），calponin （＋）， vimentin（＋）。特殊染色：PAS（＋），网染：肿瘤细胞周围（＋）。病理诊断：（右）肾球旁器细胞瘤。
