Malignant myoepitheliomas are rare malignant salivary gland neoplasms which usually occur in the parotid gland. Very little material on this topic has been published. This tumour represents a therapeutic challenge sin...Malignant myoepitheliomas are rare malignant salivary gland neoplasms which usually occur in the parotid gland. Very little material on this topic has been published. This tumour represents a therapeutic challenge since there are no specific recommendations or guidelines. We present a case of malignant myoepithelioma arising de novo in the parotid gland. We discuss our therapeutic approach and considerations on appropriate post-surgical treatment. Then we provide a review of international literature on this interesting and rare oncological entity.展开更多
Introduction Adenomyoepithelioma (AME) is uncommon characterized by bi-phasic proliferation of both epithelial and myoepithelial cells.Morethan half of the adenomyoepitheliomas (AME) are benign,but in
Myoepithelioma is a rare neoplasm of the salivary glands, generally occurring in the parotid gland and less often in the minor accessory salivary gland of the oral cavity. The histological appearance includes solid, m...Myoepithelioma is a rare neoplasm of the salivary glands, generally occurring in the parotid gland and less often in the minor accessory salivary gland of the oral cavity. The histological appearance includes solid, myxoid and reticular growth patterns. Vimentin and S-100 protein are very sensitive but non-specific immunohistochemical markers of neoplastic myoepithelium. Conservative surgery is the treatment of choice. A case of myoepithelioma of the minor salivary gland of tongue is described, focusing on clinical behaviour, histopathological and immunohistochemical features.展开更多
目的探讨软组织肌上皮瘤／混合瘤（myoepithelioma/mixed tumour of soft tissue，MMT）的临床病理学特征、免疫表型、鉴别诊断及预后。方法采用免疫组化EnVision两步法对6例MMT进行免疫组化染色，并复习相关文献。结果6例MMT中男性3例...目的探讨软组织肌上皮瘤／混合瘤（myoepithelioma/mixed tumour of soft tissue，MMT）的临床病理学特征、免疫表型、鉴别诊断及预后。方法采用免疫组化EnVision两步法对6例MMT进行免疫组化染色，并复习相关文献。结果6例MMT中男性3例，女性3例，年龄11～63岁，平均44岁。肿瘤直径2—17．5cm，平均6．5cm。免疫表型：75％（3／4）表达CK，100％（4／4）表达vimentin，66．7％（2／3）表达S-100，50％（2／4）表达GFAP，100％（3／3）表达EMA，（0／4）不表达SMA。6例MMT随访时间5—10年，3例局部复发，1例复发且发生肺转移，所有患者均存活。结论临床上，MMT通常表现为无痛性肿块，持续数周至数年，偶有局部疼痛。多发生于成人，男女比例大致相同。肿瘤境界清楚，绝大多数肿瘤位于四肢皮下或深部的筋膜下软组织。组织学上，MMT类似于涎腺的多形性腺瘤，含有不同比例的上皮和（或）肌上皮成分，间质玻璃样变或为软骨黏液样。大部分MMT为良性行为，但少数可局部复发和转移，导致死亡。展开更多
文摘Malignant myoepitheliomas are rare malignant salivary gland neoplasms which usually occur in the parotid gland. Very little material on this topic has been published. This tumour represents a therapeutic challenge since there are no specific recommendations or guidelines. We present a case of malignant myoepithelioma arising de novo in the parotid gland. We discuss our therapeutic approach and considerations on appropriate post-surgical treatment. Then we provide a review of international literature on this interesting and rare oncological entity.
文摘Introduction Adenomyoepithelioma (AME) is uncommon characterized by bi-phasic proliferation of both epithelial and myoepithelial cells.Morethan half of the adenomyoepitheliomas (AME) are benign,but in
文摘Myoepithelioma is a rare neoplasm of the salivary glands, generally occurring in the parotid gland and less often in the minor accessory salivary gland of the oral cavity. The histological appearance includes solid, myxoid and reticular growth patterns. Vimentin and S-100 protein are very sensitive but non-specific immunohistochemical markers of neoplastic myoepithelium. Conservative surgery is the treatment of choice. A case of myoepithelioma of the minor salivary gland of tongue is described, focusing on clinical behaviour, histopathological and immunohistochemical features.
文摘目的探讨软组织肌上皮瘤／混合瘤（myoepithelioma/mixed tumour of soft tissue，MMT）的临床病理学特征、免疫表型、鉴别诊断及预后。方法采用免疫组化EnVision两步法对6例MMT进行免疫组化染色，并复习相关文献。结果6例MMT中男性3例，女性3例，年龄11～63岁，平均44岁。肿瘤直径2—17．5cm，平均6．5cm。免疫表型：75％（3／4）表达CK，100％（4／4）表达vimentin，66．7％（2／3）表达S-100，50％（2／4）表达GFAP，100％（3／3）表达EMA，（0／4）不表达SMA。6例MMT随访时间5—10年，3例局部复发，1例复发且发生肺转移，所有患者均存活。结论临床上，MMT通常表现为无痛性肿块，持续数周至数年，偶有局部疼痛。多发生于成人，男女比例大致相同。肿瘤境界清楚，绝大多数肿瘤位于四肢皮下或深部的筋膜下软组织。组织学上，MMT类似于涎腺的多形性腺瘤，含有不同比例的上皮和（或）肌上皮成分，间质玻璃样变或为软骨黏液样。大部分MMT为良性行为，但少数可局部复发和转移，导致死亡。
