Diagnosis of extremity soft-tissue tumors can be challenging.Characteristics of tumor margins can help precisely identify locally aggressive or non-aggressive behavior for surgical planning,but cannot differentiate be...Diagnosis of extremity soft-tissue tumors can be challenging.Characteristics of tumor margins can help precisely identify locally aggressive or non-aggressive behavior for surgical planning,but cannot differentiate benign from malignant lesions.Most malignant tumors can have inhomogeneous signals on T2-weighted images.Although a uniform signal on T2-weighted images can be a reliable indication of a benign lesion,a well-defined mass with homogeneous internal signal intensity does not definitively identify a benign lesion.Some common and distinctive soft-tissue lesions can have specific clinical and imaging features allowing a diagnosis without biopsy.These are known as determinate lesions.This illustrative report presents a diagnostic guide for extremity soft-tissue tumors based on tissue signal and morphological characteristics on magnetic resonance images.It is important for clinicians to be familiar with the imaging characteristics of common determinate lesions.展开更多
目的探讨腱鞘纤维瘤(fibroma of tendon sheath,FTS)的临床病理学特征。方法对39例FTS的临床表现、影像学及病理学特征进行观察。结果男性24例(61.54%),女性15例(38.46%),男女比为1.6∶1,年龄5～69岁,平均34.56岁。74.36%的病例累及上肢...目的探讨腱鞘纤维瘤(fibroma of tendon sheath,FTS)的临床病理学特征。方法对39例FTS的临床表现、影像学及病理学特征进行观察。结果男性24例(61.54%),女性15例(38.46%),男女比为1.6∶1,年龄5～69岁,平均34.56岁。74.36%的病例累及上肢,尤以掌指部为主。临床上,66.67%病例表现为局部无痛性缓慢生长的肿块,33.33%病例伴局部压痛、肿痛症状。10.26%病例曾有局部外伤史,患者术后复发率为14.29%。以MRI为代表的影像学成像显示病变与肌腱、腱鞘或关节囊紧密相连。大体上,病变包膜纤薄或无包膜。镜下病变呈分叶状,每个小叶由稀疏散在的纤维母细胞、裂隙状血管腔隙和大量玻璃样变胶原间质所组成。部分病变形态多样,局部与促结缔组织增生性纤维母细胞瘤、纤维组织细胞瘤或纤维瘤病、结节性筋膜炎及微静脉型血管瘤病变相似。免疫组化示所有成分均表达vimentin,部分梭形及星形细胞表达α-SMA、calponin及CD163,少数病变局灶弱阳性表达β-catenin(胞质)、CD68、MSA及h-Caldesmon,裂隙状腔隙内衬扁平细胞表达CD34、CD31及FⅧRAg,提示为血管性腔隙。结论 FTS是一种相对少见的发生于肌腱、腱鞘或关节滑囊的良性纤维母/肌纤维母细胞增生性病变。典型的FTS多发生于青年人及成年人,以男性居多,好发于上肢,掌指部占多数,少数病变切除后可复发。展开更多
文摘Diagnosis of extremity soft-tissue tumors can be challenging.Characteristics of tumor margins can help precisely identify locally aggressive or non-aggressive behavior for surgical planning,but cannot differentiate benign from malignant lesions.Most malignant tumors can have inhomogeneous signals on T2-weighted images.Although a uniform signal on T2-weighted images can be a reliable indication of a benign lesion,a well-defined mass with homogeneous internal signal intensity does not definitively identify a benign lesion.Some common and distinctive soft-tissue lesions can have specific clinical and imaging features allowing a diagnosis without biopsy.These are known as determinate lesions.This illustrative report presents a diagnostic guide for extremity soft-tissue tumors based on tissue signal and morphological characteristics on magnetic resonance images.It is important for clinicians to be familiar with the imaging characteristics of common determinate lesions.
文摘目的探讨腱鞘纤维瘤(fibroma of tendon sheath,FTS)的临床病理学特征。方法对39例FTS的临床表现、影像学及病理学特征进行观察。结果男性24例(61.54%),女性15例(38.46%),男女比为1.6∶1,年龄5～69岁,平均34.56岁。74.36%的病例累及上肢,尤以掌指部为主。临床上,66.67%病例表现为局部无痛性缓慢生长的肿块,33.33%病例伴局部压痛、肿痛症状。10.26%病例曾有局部外伤史,患者术后复发率为14.29%。以MRI为代表的影像学成像显示病变与肌腱、腱鞘或关节囊紧密相连。大体上,病变包膜纤薄或无包膜。镜下病变呈分叶状,每个小叶由稀疏散在的纤维母细胞、裂隙状血管腔隙和大量玻璃样变胶原间质所组成。部分病变形态多样,局部与促结缔组织增生性纤维母细胞瘤、纤维组织细胞瘤或纤维瘤病、结节性筋膜炎及微静脉型血管瘤病变相似。免疫组化示所有成分均表达vimentin,部分梭形及星形细胞表达α-SMA、calponin及CD163,少数病变局灶弱阳性表达β-catenin(胞质)、CD68、MSA及h-Caldesmon,裂隙状腔隙内衬扁平细胞表达CD34、CD31及FⅧRAg,提示为血管性腔隙。结论 FTS是一种相对少见的发生于肌腱、腱鞘或关节滑囊的良性纤维母/肌纤维母细胞增生性病变。典型的FTS多发生于青年人及成年人,以男性居多,好发于上肢,掌指部占多数,少数病变切除后可复发。
