BACKGROUND Mixed epithelial and stromal tumors of the kidney (MESTKs) are a rare entity (about a hundred cases reported).They occur almost exclusively in postmenopausal women,with only seven cases reported in men.As t...BACKGROUND Mixed epithelial and stromal tumors of the kidney (MESTKs) are a rare entity (about a hundred cases reported).They occur almost exclusively in postmenopausal women,with only seven cases reported in men.As this entity is very rare,little is known on its imaging features,especially magnetic resonance imaging (MRI) findings.In women,at MRI,the cystic component shows T1 hypointensity and T2 hyperintensity,while the solid component shows T1 hyperintensity and T2 hypointensity.CASE SUMMARY We report the computed tomography (CT) and MRI findings of MESTK in a 19- year-old male adolescent.To our knowledge,this case report is the first report of MRI findings of MESTK in male adolescents.The patient was admitted to Subei People's Hospital (Jiangsu Province,China) in July 2017 after a renal mass on the left side was detected by ultrasound during a clinical examination.Blood tests were all normal.Non-enhanced CT showed a round,well-circumscribed complex mass,approximately 45 mm × 40 mm in size.MRI revealed a clear wellcircumscribed mass with a mixed arrangement of solid and cystic components.On T2 weighted images,some hypointensities were found in the solid areas.After contrast enhancement,moderate or mild enhancement was found in the solid component,which increased with time.A radical left nephrectomy was performed.The pathology analysis revealed a mixed epithelial and stromal tumor.The patient had no imaging findings of recurrence or metastasis at 12 months following surgery.CONCLUSION The possibility of MESTK should be considered in male adolescents.MRI can provide useful information for the preoperative diagnosis.展开更多
Mixed epithelial and stromal tumor of the kidney (MESTK) is a recently described rare neoplasm. Malignant transformation, recurrence and metastasis are rare, therefore histopathological distinction from other renal ne...Mixed epithelial and stromal tumor of the kidney (MESTK) is a recently described rare neoplasm. Malignant transformation, recurrence and metastasis are rare, therefore histopathological distinction from other renal neoplasms, especially from renal cell carcinoma is important. Histologically the tumor is composed of biphasic components including cysts and tubules embedded in the spindle cell stroma. We report a case of a MESTK in 60-year-old postmenopousal woman who presented with an incidental solid renal mass but no urinary complaint.展开更多
Background:Renal cysts are common in clinical practice,but some may harbor rare pathological entities such as mixed epithelial and stromal tumors(MEST).Imaging studies are crucial for accurate diagnosis.While laparosc...Background:Renal cysts are common in clinical practice,but some may harbor rare pathological entities such as mixed epithelial and stromal tumors(MEST).Imaging studies are crucial for accurate diagnosis.While laparoscopic deroofing is an established approach for symptomatic renal cysts,encountering MEST within a cyst is uncommon.Case Presentation:We present the case of a 37-year-old female who presented with persistent left flank pain.Imaging revealed a large renal cyst in the lower pole of the left kidney,classified as Bosniak 2.Despite analgesia,the patient's symptoms persisted,leading to a laparoscopic deroofing procedure.Histopathological examination postprocedure revealed a MEST.The patient reported complete resolution of symptoms at the 3-month follow-up.Conclusion:This unique case presents the successful identification and surgical management of a MEST masquerading as a lower pole renal cyst through laparoscopic deroofing.It also contributes to the existing literature by highlighting the importance of considering rare pathological entities in the evaluation of renal cysts and the value of laparoscopic techniques in their management.展开更多
目的探讨肾混合性上皮间质肿瘤(m ixed ep ithelial and strom al tumor of the k idney,MESTK)的临床病理学特点、免疫表型和鉴别诊断。方法运用光镜和免疫组化方法分析4例MESTK,并复习有关文献。结果女性3例、男性1例,平均发病年龄为3...目的探讨肾混合性上皮间质肿瘤(m ixed ep ithelial and strom al tumor of the k idney,MESTK)的临床病理学特点、免疫表型和鉴别诊断。方法运用光镜和免疫组化方法分析4例MESTK,并复习有关文献。结果女性3例、男性1例,平均发病年龄为39岁。临床表现为腰痛、肉眼或镜下血尿。巨检肿瘤境界清楚,呈实性。镜检以不等量增生、囊性扩张腺上皮与不同排列方式的梭形细胞间质混合组成为特征。免疫表型为梭形细胞vim entin(3/3)、desm in(2/4)、SMA(3/4)、ER(2/3)、PR(3/3)呈阳性表达,不表达CD34(0/3)、S-100蛋白(0/2)、HMB45(0/2);上皮细胞CKpan(4/4)、EMA(4/4)呈阳性表达。结论MESTK是一种少见的肾良性混合性肿瘤,其诊断主要依靠组织病理学和免疫组化标记。展开更多
目的探讨青少年肾混合性上皮间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)的临床病理学特征,提高对此罕见疾病的认识。方法对1例MESTK(17岁)的临床病理学特征及免疫表型,并复习相关文献,综合分析青少年MESTK的临...目的探讨青少年肾混合性上皮间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)的临床病理学特征,提高对此罕见疾病的认识。方法对1例MESTK(17岁)的临床病理学特征及免疫表型,并复习相关文献,综合分析青少年MESTK的临床及病理特征。结果患者女性,17岁,临床表现为先天性会阴部液体外溢。镜下见肿瘤呈结节状生长,肿瘤由上皮和间质两种成分构成,腺上皮细胞呈柱状或纤毛柱状;腺体周围间质细胞丰富似卵巢样,远离腺体的梭性细胞呈束状平滑肌样分化。免疫表型:上皮细胞CK7、vimentin阳性,间质细胞SMA、vimentin、ER、PR均阳性,远离腺体的间质细胞desmin阳性。结论 MESTK是一种罕见的肾脏良性肿瘤,多见于围绝经期女性,亦可发生于青少年,且与激素使用史无关,需与发生于青少年具有双向分化的肾肿瘤相鉴别。展开更多
患者男，49岁，主因“体检发现左肾肿物5月余”人院，自述平素无背部酸痛，无尿痛、尿频、尿急及肉眼血尿；否认药物长期应用史。CT：左肾下极类椭圆形肿块，约57mm×38mm，内见点条状高密度影，增强后呈轻度强化（图1A）。静脉肾...患者男，49岁，主因“体检发现左肾肿物5月余”人院，自述平素无背部酸痛，无尿痛、尿频、尿急及肉眼血尿；否认药物长期应用史。CT：左肾下极类椭圆形肿块，约57mm×38mm，内见点条状高密度影，增强后呈轻度强化（图1A）。静脉肾盂造影（图1B）：左肾下组肾盏见局限性充盈缺损。影像学提示：左肾下极肿瘤，考虑为囊性肾细胞癌合并出血。遂行左肾肿物切除术。术后病理诊断（图1C）：肾混合性上皮间质瘤（mixedepi-thelial and stromal tumor of the kidney，MESTK）。随访24个月，未见肿瘤复发。展开更多
目的探讨肾混合性上皮和间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)临床病理特征。方法收集5例MESTK的临床资料及随访结果,采用HE染色及免疫组织化学染色,观察组织学特征及免疫组织化学特点,并复习相关文献。结...目的探讨肾混合性上皮和间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)临床病理特征。方法收集5例MESTK的临床资料及随访结果,采用HE染色及免疫组织化学染色,观察组织学特征及免疫组织化学特点,并复习相关文献。结果5例均为女性,年龄44~62岁,平均51.2岁。临床表现主要为腰背部疼痛及血尿,影像学检查提示肾脏囊实性占位。病理大体表现为肾脏界线清楚的囊实性肿瘤,多位于肾中极;组织学特征:肿瘤由上皮和间质成分混合构成,上皮排列成小管、微囊、大囊、乳头等结构,间质由梭形细胞组成,疏密不一,可见卵巢样间质、间质水肿及慢性炎症细胞浸润,上皮及间质细胞均未见明显异型性。免疫组织化学:上皮细胞表达广谱细胞角蛋白(CK_(pan))、CK7、PAX-8、P504S,间质细胞大多表达结蛋白(desmin)、平滑肌肌动蛋白(SMA)、雌激素受体(ER)、孕激素受体(PR)、CD10,Ki-67增殖指数低。结论MESTK是一种罕见的良性肾脏肿瘤,好发于围绝经期女性,影像学检查常误诊为囊性肾癌,有独特的病理组织学和免疫组织化学表现,肿物完整切除后,预后良好。展开更多
目的探讨肾混合性上皮和间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)的临床病理特征和诊断要点。方法分析1例MESTK的临床病理资料,观察其组织学形态及免疫表型特征,并复习相关文献。结果患者,女性,61岁。肾占位...目的探讨肾混合性上皮和间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)的临床病理特征和诊断要点。方法分析1例MESTK的临床病理资料,观察其组织学形态及免疫表型特征,并复习相关文献。结果患者,女性,61岁。肾占位术后标本病理检查结果示:肿瘤大体为多个囊腔和实性区域构成,镜下呈双向分化,主要由上皮和间质成分组成,两种成分相互交织存在,上皮由大囊、微囊和小管形成,囊壁被覆扁平、立方或高柱状上皮细胞,部分上皮具有苗勒细胞分化可能,间质呈粘液样改变。未见明显核分裂像和异形性。免疫组化表型:肿瘤上皮细胞表达CK、vimentin,肿瘤间质细胞表达desmin、ER、PR、SMA,而α-inhibin及CR表达阴性。结论MESTK是一种罕见的良性的混合性肿瘤,可能具有一定的恶性潜能,具有较为独特的上皮和间质的组织病理学特点(上皮成分是由大囊,微囊及小管组成,间质粘液样变性),应与肾脏其他囊性及双向分化的肿瘤相鉴别。展开更多
基金Supported by National Natural Science Foundation of China,No.81401384Social Develop Foundation of Yangzhou,No.2017066+1 种基金Yangzhou City Science and Education Strengthening Leading Talents Project,No.LJRC201810Yangzhou City Science and Education Strengthening Key Talents Project,No.ZDRC201873
文摘BACKGROUND Mixed epithelial and stromal tumors of the kidney (MESTKs) are a rare entity (about a hundred cases reported).They occur almost exclusively in postmenopausal women,with only seven cases reported in men.As this entity is very rare,little is known on its imaging features,especially magnetic resonance imaging (MRI) findings.In women,at MRI,the cystic component shows T1 hypointensity and T2 hyperintensity,while the solid component shows T1 hyperintensity and T2 hypointensity.CASE SUMMARY We report the computed tomography (CT) and MRI findings of MESTK in a 19- year-old male adolescent.To our knowledge,this case report is the first report of MRI findings of MESTK in male adolescents.The patient was admitted to Subei People's Hospital (Jiangsu Province,China) in July 2017 after a renal mass on the left side was detected by ultrasound during a clinical examination.Blood tests were all normal.Non-enhanced CT showed a round,well-circumscribed complex mass,approximately 45 mm × 40 mm in size.MRI revealed a clear wellcircumscribed mass with a mixed arrangement of solid and cystic components.On T2 weighted images,some hypointensities were found in the solid areas.After contrast enhancement,moderate or mild enhancement was found in the solid component,which increased with time.A radical left nephrectomy was performed.The pathology analysis revealed a mixed epithelial and stromal tumor.The patient had no imaging findings of recurrence or metastasis at 12 months following surgery.CONCLUSION The possibility of MESTK should be considered in male adolescents.MRI can provide useful information for the preoperative diagnosis.
文摘Mixed epithelial and stromal tumor of the kidney (MESTK) is a recently described rare neoplasm. Malignant transformation, recurrence and metastasis are rare, therefore histopathological distinction from other renal neoplasms, especially from renal cell carcinoma is important. Histologically the tumor is composed of biphasic components including cysts and tubules embedded in the spindle cell stroma. We report a case of a MESTK in 60-year-old postmenopousal woman who presented with an incidental solid renal mass but no urinary complaint.
文摘Background:Renal cysts are common in clinical practice,but some may harbor rare pathological entities such as mixed epithelial and stromal tumors(MEST).Imaging studies are crucial for accurate diagnosis.While laparoscopic deroofing is an established approach for symptomatic renal cysts,encountering MEST within a cyst is uncommon.Case Presentation:We present the case of a 37-year-old female who presented with persistent left flank pain.Imaging revealed a large renal cyst in the lower pole of the left kidney,classified as Bosniak 2.Despite analgesia,the patient's symptoms persisted,leading to a laparoscopic deroofing procedure.Histopathological examination postprocedure revealed a MEST.The patient reported complete resolution of symptoms at the 3-month follow-up.Conclusion:This unique case presents the successful identification and surgical management of a MEST masquerading as a lower pole renal cyst through laparoscopic deroofing.It also contributes to the existing literature by highlighting the importance of considering rare pathological entities in the evaluation of renal cysts and the value of laparoscopic techniques in their management.
文摘目的探讨肾混合性上皮间质肿瘤(m ixed ep ithelial and strom al tumor of the k idney,MESTK)的临床病理学特点、免疫表型和鉴别诊断。方法运用光镜和免疫组化方法分析4例MESTK,并复习有关文献。结果女性3例、男性1例,平均发病年龄为39岁。临床表现为腰痛、肉眼或镜下血尿。巨检肿瘤境界清楚,呈实性。镜检以不等量增生、囊性扩张腺上皮与不同排列方式的梭形细胞间质混合组成为特征。免疫表型为梭形细胞vim entin(3/3)、desm in(2/4)、SMA(3/4)、ER(2/3)、PR(3/3)呈阳性表达,不表达CD34(0/3)、S-100蛋白(0/2)、HMB45(0/2);上皮细胞CKpan(4/4)、EMA(4/4)呈阳性表达。结论MESTK是一种少见的肾良性混合性肿瘤,其诊断主要依靠组织病理学和免疫组化标记。
文摘目的探讨青少年肾混合性上皮间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)的临床病理学特征,提高对此罕见疾病的认识。方法对1例MESTK(17岁)的临床病理学特征及免疫表型,并复习相关文献,综合分析青少年MESTK的临床及病理特征。结果患者女性,17岁,临床表现为先天性会阴部液体外溢。镜下见肿瘤呈结节状生长,肿瘤由上皮和间质两种成分构成,腺上皮细胞呈柱状或纤毛柱状;腺体周围间质细胞丰富似卵巢样,远离腺体的梭性细胞呈束状平滑肌样分化。免疫表型:上皮细胞CK7、vimentin阳性,间质细胞SMA、vimentin、ER、PR均阳性,远离腺体的间质细胞desmin阳性。结论 MESTK是一种罕见的肾脏良性肿瘤,多见于围绝经期女性,亦可发生于青少年,且与激素使用史无关,需与发生于青少年具有双向分化的肾肿瘤相鉴别。
文摘患者男，49岁，主因“体检发现左肾肿物5月余”人院，自述平素无背部酸痛，无尿痛、尿频、尿急及肉眼血尿；否认药物长期应用史。CT：左肾下极类椭圆形肿块，约57mm×38mm，内见点条状高密度影，增强后呈轻度强化（图1A）。静脉肾盂造影（图1B）：左肾下组肾盏见局限性充盈缺损。影像学提示：左肾下极肿瘤，考虑为囊性肾细胞癌合并出血。遂行左肾肿物切除术。术后病理诊断（图1C）：肾混合性上皮间质瘤（mixedepi-thelial and stromal tumor of the kidney，MESTK）。随访24个月，未见肿瘤复发。
文摘目的探讨肾混合性上皮和间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)临床病理特征。方法收集5例MESTK的临床资料及随访结果,采用HE染色及免疫组织化学染色,观察组织学特征及免疫组织化学特点,并复习相关文献。结果5例均为女性,年龄44~62岁,平均51.2岁。临床表现主要为腰背部疼痛及血尿,影像学检查提示肾脏囊实性占位。病理大体表现为肾脏界线清楚的囊实性肿瘤,多位于肾中极;组织学特征:肿瘤由上皮和间质成分混合构成,上皮排列成小管、微囊、大囊、乳头等结构,间质由梭形细胞组成,疏密不一,可见卵巢样间质、间质水肿及慢性炎症细胞浸润,上皮及间质细胞均未见明显异型性。免疫组织化学:上皮细胞表达广谱细胞角蛋白(CK_(pan))、CK7、PAX-8、P504S,间质细胞大多表达结蛋白(desmin)、平滑肌肌动蛋白(SMA)、雌激素受体(ER)、孕激素受体(PR)、CD10,Ki-67增殖指数低。结论MESTK是一种罕见的良性肾脏肿瘤,好发于围绝经期女性,影像学检查常误诊为囊性肾癌,有独特的病理组织学和免疫组织化学表现,肿物完整切除后,预后良好。
文摘目的探讨肾混合性上皮和间质肿瘤(mixed epithelial and stromal tumor of the kidney,MESTK)的临床病理特征和诊断要点。方法分析1例MESTK的临床病理资料,观察其组织学形态及免疫表型特征,并复习相关文献。结果患者,女性,61岁。肾占位术后标本病理检查结果示:肿瘤大体为多个囊腔和实性区域构成,镜下呈双向分化,主要由上皮和间质成分组成,两种成分相互交织存在,上皮由大囊、微囊和小管形成,囊壁被覆扁平、立方或高柱状上皮细胞,部分上皮具有苗勒细胞分化可能,间质呈粘液样改变。未见明显核分裂像和异形性。免疫组化表型:肿瘤上皮细胞表达CK、vimentin,肿瘤间质细胞表达desmin、ER、PR、SMA,而α-inhibin及CR表达阴性。结论MESTK是一种罕见的良性的混合性肿瘤,可能具有一定的恶性潜能,具有较为独特的上皮和间质的组织病理学特点(上皮成分是由大囊,微囊及小管组成,间质粘液样变性),应与肾脏其他囊性及双向分化的肿瘤相鉴别。
