目的：探讨软骨肉瘤的CT和MR及其增强表现，分析其病理基础。方法：回顾分析经手术病理证实的软骨肉瘤27例，术前分别或同时经X线平片、CT平扫和增强、MR SE T1WI、T2WI和T1WI增强扫描，复习影像学扫描结果并和手术病理作对照。结果：2...目的：探讨软骨肉瘤的CT和MR及其增强表现，分析其病理基础。方法：回顾分析经手术病理证实的软骨肉瘤27例，术前分别或同时经X线平片、CT平扫和增强、MR SE T1WI、T2WI和T1WI增强扫描，复习影像学扫描结果并和手术病理作对照。结果：27例软骨肉瘤中，普通型22例，间充质型3例，去分化型2例。发病部位包括骨盆11例，管状骨10例，肋骨2例，胸骨1例，椎体1例，软组织1例，腹膜后1例。肿瘤直径4．5～23．0cm，〈5．0cm2例，5．0～10．0cm17例，〉10．0cm8例。骨质破坏呈轻度膨胀性或溶骨性，密度等于或低于肌肉密度，钙化21例，扇贝状分叶边缘19例，骨膜增生3例。肿瘤CT值等于或低于肌肉；MR T1WI呈等低信号，T2WI为显著高信号，高信号内总见弓环状低信号分隔或低信号结节。CT和MR增强13例，小叶分隔呈环弓状进行性持续强化，小叶自身不强化。结论：扇贝状分叶边缘、弓环状钙化、T2WI显著高信号内存在弓环状低信号、弓环状进行性强化等构成各型软骨肉瘤的特异性影像学特征，对诊断具有重要价值。展开更多
目的分析骨盆软骨肉瘤的影像表现及其病理基础，以提高诊断准确性。方法回顾分析经手术病理证实的骨盆软骨肉瘤12例，术前分别经X线平片、CT平扫、MR SE T1WI、T2WI和增强T1WI，仔细复习影像学扫描结果并和手术病理作对照。结果12例骨...目的分析骨盆软骨肉瘤的影像表现及其病理基础，以提高诊断准确性。方法回顾分析经手术病理证实的骨盆软骨肉瘤12例，术前分别经X线平片、CT平扫、MR SE T1WI、T2WI和增强T1WI，仔细复习影像学扫描结果并和手术病理作对照。结果12例骨盆软骨肉瘤，普通型11例，去分化型1例。发病部位包括髂骨2例，髋臼3例，坐骨和耻骨6例，骶尾骨1例。肿瘤直径4．7～17．0cm，〈5．0cm者1例，5．0～10．0em者6例，〉10．0cm者5例。病灶呈轻度膨胀性或溶骨性骨质破坏，11例边缘呈扇贝状分叶，1例境界不清。X线平片检查8例中，弓环状钙化1例，隐约钙化6例，无钙化1例，显著软组织肿块3例，骨膜增生1例。CT检查5例，肿瘤密度等于或低于肌肉密度，5例均可见轻度弓环状钙化和软组织肿块。MR检查7例，T1WI等低信号7例，T2WI显著高信号7例，其中6例T2WI高信号内可见弓环状低信号分隔，1例见低信号结节，7例见明显软组织肿块。增强T1WI6例，所有小叶分隔呈进行性持续强化，小叶自身不强化。结论MRI可直接显示骨盆软骨肉瘤的病理特征，优于CT和平片。CT对显示解剖学复杂的骨盆病灶及轻微钙化等有明显价值。展开更多
Extraskeletal myxoid chondrosarcoma (EMC) is a lowgrade sarcoma characterized by developing metastases and local recurrence in high rate. It is mainly deep seated in the proximal extremities. The most common metastati...Extraskeletal myxoid chondrosarcoma (EMC) is a lowgrade sarcoma characterized by developing metastases and local recurrence in high rate. It is mainly deep seated in the proximal extremities. The most common metastatic sites are the lungs, soft tissues, lymph nodes, bones and the brain. To our knowledge, no case of clearly defined EMC has been reported to date developing a metastasis in the pancreas. We describe a case of a man suffering from EMC who developed a single pancreatic metastasis 20 years after the initial diagnosis. A 49-year-old man was submitted to surgical excision of an EMC, in left thigh, 20 years ago. Fourteen years after the initial diagnosis a local recurrence in left thigh occurred. Multiple lesions of metastatic origin, in both lungs, were excised via thoracotomies until the time being. In 2003, as a part of a periodically performed imaging control, an abdominal CT scan was performed revealing a solid lesion in the pancreas. Distal pancreatectomy was performed. The histopathology of the excised specimen proved to be the one of metastatic lesion of EMC. The above-mentioned case of EMC is, as far as we know, the first one described developing a certain pancreatic metastasis.展开更多
文摘目的：探讨软骨肉瘤的CT和MR及其增强表现，分析其病理基础。方法：回顾分析经手术病理证实的软骨肉瘤27例，术前分别或同时经X线平片、CT平扫和增强、MR SE T1WI、T2WI和T1WI增强扫描，复习影像学扫描结果并和手术病理作对照。结果：27例软骨肉瘤中，普通型22例，间充质型3例，去分化型2例。发病部位包括骨盆11例，管状骨10例，肋骨2例，胸骨1例，椎体1例，软组织1例，腹膜后1例。肿瘤直径4．5～23．0cm，〈5．0cm2例，5．0～10．0cm17例，〉10．0cm8例。骨质破坏呈轻度膨胀性或溶骨性，密度等于或低于肌肉密度，钙化21例，扇贝状分叶边缘19例，骨膜增生3例。肿瘤CT值等于或低于肌肉；MR T1WI呈等低信号，T2WI为显著高信号，高信号内总见弓环状低信号分隔或低信号结节。CT和MR增强13例，小叶分隔呈环弓状进行性持续强化，小叶自身不强化。结论：扇贝状分叶边缘、弓环状钙化、T2WI显著高信号内存在弓环状低信号、弓环状进行性强化等构成各型软骨肉瘤的特异性影像学特征，对诊断具有重要价值。
文摘目的分析骨盆软骨肉瘤的影像表现及其病理基础，以提高诊断准确性。方法回顾分析经手术病理证实的骨盆软骨肉瘤12例，术前分别经X线平片、CT平扫、MR SE T1WI、T2WI和增强T1WI，仔细复习影像学扫描结果并和手术病理作对照。结果12例骨盆软骨肉瘤，普通型11例，去分化型1例。发病部位包括髂骨2例，髋臼3例，坐骨和耻骨6例，骶尾骨1例。肿瘤直径4．7～17．0cm，〈5．0cm者1例，5．0～10．0em者6例，〉10．0cm者5例。病灶呈轻度膨胀性或溶骨性骨质破坏，11例边缘呈扇贝状分叶，1例境界不清。X线平片检查8例中，弓环状钙化1例，隐约钙化6例，无钙化1例，显著软组织肿块3例，骨膜增生1例。CT检查5例，肿瘤密度等于或低于肌肉密度，5例均可见轻度弓环状钙化和软组织肿块。MR检查7例，T1WI等低信号7例，T2WI显著高信号7例，其中6例T2WI高信号内可见弓环状低信号分隔，1例见低信号结节，7例见明显软组织肿块。增强T1WI6例，所有小叶分隔呈进行性持续强化，小叶自身不强化。结论MRI可直接显示骨盆软骨肉瘤的病理特征，优于CT和平片。CT对显示解剖学复杂的骨盆病灶及轻微钙化等有明显价值。
文摘Extraskeletal myxoid chondrosarcoma (EMC) is a lowgrade sarcoma characterized by developing metastases and local recurrence in high rate. It is mainly deep seated in the proximal extremities. The most common metastatic sites are the lungs, soft tissues, lymph nodes, bones and the brain. To our knowledge, no case of clearly defined EMC has been reported to date developing a metastasis in the pancreas. We describe a case of a man suffering from EMC who developed a single pancreatic metastasis 20 years after the initial diagnosis. A 49-year-old man was submitted to surgical excision of an EMC, in left thigh, 20 years ago. Fourteen years after the initial diagnosis a local recurrence in left thigh occurred. Multiple lesions of metastatic origin, in both lungs, were excised via thoracotomies until the time being. In 2003, as a part of a periodically performed imaging control, an abdominal CT scan was performed revealing a solid lesion in the pancreas. Distal pancreatectomy was performed. The histopathology of the excised specimen proved to be the one of metastatic lesion of EMC. The above-mentioned case of EMC is, as far as we know, the first one described developing a certain pancreatic metastasis.
