Intradural chordoma of the tentorium cerebelli. Case report

A rare case of intradural chordoma is described. The literature contains seven examples of intradural extraosseous chordoma, all reported in a ventral location. This is the first reported case of a primary intradural chordoma distant from the clivus and involving both the supra- and infratentorial compartments.     

Cavernous angioma of the tentorium cerebelli. Case report

The case of a cavernous angioma of the tentorium cerebelli is described. This is the seventh reported case of a cavernous angioma in this unusual location and the first of a dural cavernous angioma demonstrated by magnetic resonance imaging. The clinical presentation, radiographic features, and surgical treatment of these rare tumors are discussed, along with a review of the literature.     

肝脏孤立性纤维性肿瘤1例

正患者男,41岁,反复上腹胀2个月。CT(图1):平扫显示肝右叶前下段类圆形肿块影,边界清楚,大小约7.54cm×6.91cm,呈不均匀性稍低密度,CT值30 HU,增强扫描动脉期病灶内可见少许明显强化血管影,肿块整体呈不均匀性轻度强化,CT值45HU,静脉期(CT值51HU)及延迟期(CT值68HU)进一步强化,整体呈不均匀性渐进性强化。MRI(图2):肿块T1WI呈稍低信号,其内可见斑片状更低信号,T2WI呈混杂高信号,可见斑片状或条索状低信号,T2WI压脂     

气管孤立性纤维性肿瘤1例

正患者女,47岁,因"受凉后咳嗽、咳痰2周,咯鲜红色血痰1天"入院。气管镜检查:气管管腔内距气管隆突约2~3cm处见一新生物,约1.2cm×0.8cm,气管管腔近1/2被堵塞,表面有较多血性分泌物(图1A)。胸部CT:平扫见气管隆突前上方的气管左侧壁有一乳头状结节影,密度均匀,CT值61 HU,边缘光整,与相邻的气管壁呈窄基相连,气管壁未见异常;增强后肿块明显均匀强化(图1B),CT值201 HU,相邻的气管壁无明     

盆腔孤立性纤维性肿瘤1例

<正>患者男,52岁,因"肛门坠胀不适4月余,加重伴排便费力1周"入院。查体:右下腹压痛。直肠指检:骶前直肠下段右侧旁占位性包块。实验室检查:白蛋白37.91g/L,乳酸2.96mmol/L,氯112.20 mmol/L,二氧化碳17.00 mmol/L,B型尿钠肽116.17pg/ml,癌胚抗原1.54μg/L,糖类抗原CA19-9 7.84 U/ml。超声检查:盆腔见大小约9.11cm×8.37cm×7.64cm低回声团块,形状规整(图1A)。CT检查:右侧坐骨直肠窝至盆腔内     

肾窦孤立性纤维瘤1例

患者女,52岁,因"体检发现右肾窦肿瘤1年"入院。查体未见明显异常。实验室检查空腹血糖3.82mmol/L。CT:平扫见右肾窦不规则等低混杂密度肿块(图1A),边界清,大小约5.8cm×3.7cm×7.5cm,CT值约23~48 HU;增强扫描皮质期病灶不均匀强化(图1B),排泄期病灶强化程度增高、范围扩大(图1C),考虑乏脂型血管平滑肌脂肪瘤可能。于1周后行腹腔镜下根治性右肾切除术。     

Solitary fibrous tumor of the orbit. Case report and review of the literature.

BACKGROUND: Solitary fibrous tumor (SFT), which usually presents in the pleura and is thought to be mesothelial in nature, has been recently discovered in extrapleural sites, including the orbit. Presently ultrastructural studies show absence of epithelial-mesothelial features, and reactivity of the tumor cells to CD34 antigen on immunohistochemical analysis suggests the mesenchymal origin of such tumors. CASE DESCRIPTION: A 40-year-old woman had a 4-year history of progressive swelling of her right upper lid and a slow-growing palpable mass of the orbit. CT and MR imaging showed a well circumscribed, nonenhanced extraconal mass with mild erosion of the right orbital roof. The tumor was totally excised. Histological examination disclosed a spindle-cell tumor in a dense fibrous tissue. Immunohistochemistry showed positive staining for vimentin and CD34. We review the clinical, diagnostic, and surgical features of 22 orbital SFTs including the present case. CONCLUSIONS: Orbital SFT generally pursues a slow, indolent, and nonaggressive course, reaches a size up to 4.5 cm, and can be cured by a single excision. It must be immunohistochemically differentiated from other spindle-cell tumors of the orbit.     

第三脑室孤立性纤维性肿瘤/血管外皮细胞瘤1例

正患者女,54岁,7个月前无明显诱因出现双下肢无力,偶有头晕,无恶心、呕吐,3个月前发现记忆力下降;发病以来神志清、精神可,睡眠正常。MRI:第三脑室可见不规则斑片状混杂等长T1等T2信号,约36.6mm×41.5mm×49.2mm,病灶内见斑片状囊性长T1长T2信号,瘤周见多发流空血管影,双侧丘脑及中脑受压移位,内见斑片状稍长T2信号(图1A、1B);增强扫描病灶呈明显强化,囊性区无强化(图1C)。MRI诊断:脑     

Peripheral-type primitive neuroectodermal tumor arising in the tentorium. Case report.

The authors report the case of a peripheral primitive neuroectodermal tumor (PNET) arising in the tentorium in a 5-year-old boy who presented with frequent vomiting and mild palsy of the left abducent nerve. Following complete surgical excision of the tumor via a transpetrosal approach, the patient has thus far been disease free for 7 years. The tumor tissue was composed of small cells with uniform round nuclei and minimal identifiable cytoplasm. Homer-Wright rosettes were frequently observed. Immunohistochemical studies demonstrated a positive reaction to HBA-71, which recognizes the cell surface glycoprotein p30/32, a product of the MIC2 gene. Both the clinical and immunohistochemical characteristics of this tumor are consistent with a diagnosis of peripheral PNET, which is genetically distinct from the more common intracranial PNET.     

Solitary fibrous tumor of the pancreas: Case report and review of the literature

Solitary fibrous tumor (SFT) is a mesenchymal tumor typically located in the pleura, but can also be found as an asymptomatic mass in other areas, including the liver, peritoneum, kidney and salivary glands. However, SFT rarely locates in the pancreas. We present such a case of pancreatic SFT, along with a review of all reported cases. A 55-year-old man was treated surgically for an asymptomatic pancreatic mass after a rigorous preoperative control. Histologic examination of the resected specimen showed characteristics of an SFT. As only 15 cases of pancreatic SFT have been reported so far, an attempt to compare the cases was considered intriguing. We found that patients with pancreatic SFT were mainly women (81.25%), with a median age of 54 years at the time of diagnosis and a median tumor size of 5.83 cm. Pancreatic SFTs were revealed incidentally in 50% of cases, and all of them showed an enhancement through arterial computed tomography. All tumors were positive for CD34, ten were positive for Bcl-2, and twelve were negative for S100. The diagnosis of this pancreatic tumor is established by a combination of clinical suspicion, imaging procedures and histological findings, and is confirmed by immunohistochemical staining. Although the behavior of SFTs is rather benign, close clinical follow-up is recommended due to a potentially malignant nature.     

Solitary fibrous tumor arising from the falx cerebri--case report

A 50-year-old female was admitted with headache and visual disturbance. Neuroimaging demonstrated a well-demarcated large tumor attached to the falx cerebri. The tumor was totally removed by surgery. Histological examination showed that the tumor consisted of spindle cells with no pattern in the collagenous background. Staghorn-like blood vessels were common. Immunohistochemical study showed the tumor cells were strongly positive for CD34 and vimentin, but negative for epithelial membrane antigen. The diagnosis was solitary fibrous tumor arising from the falx cerebri. Solitary fibrous tumor is rare within the cranial cavity, and can be distinguished from meningioma and hemangiopericytoma by the histological, ultrastructural, and immunohistochemical findings.     

Solitary fibrous tumor of the mediastinum. A report of 14 cases

Fourteen cases of a mediastinal neoplasm identical to solitary fibrous tumor (so-called fibrous mesothelioma) of the pleura were observed. The lesions presented with cough, chest pain, dyspnea, or as asymptomatic masses detected radiographically. Two patients had associated hypoglycemia. Eleven of the tumors were in the antero-superior mediastinum. One arose on a pedicle from the thymus, and another had entrapped thymic elements. Tumor cells were variably immunoreactive for vimentin and actin, but not for keratin, and lacked ultrastructural evidence of mesothelial or epithelial differentiation. Eight cases had highly cellular mitotically active regions of which six of seven with follow-up behaved aggressively; the exception was the pedunculated tumor. A 13-cm, histologically bland tumor has recurred twice. Aggressive behavior was more common than reported for solitary fibrous tumor of the pleura, but the same criteria (size, cellularity, mitotic activity, presence of pedicle) were of prognostic significance. The occurrence of solitary fibrous tumor in the mediastinum with the suggestion of thymic origin for some cases, combined with the immunohistochemical and ultrastructural findings, support a mesenchymal origin for this tumor. The differential diagnosis includes spindle cell thymoma, hemangiopericytoma, and peripheral nerve tumors.     

Solitary fibrous tumor of the fourth ventricle: case report

A rare case of solitary fibrous tumor, located wholly within the fourth ventricle, is reported. A 57-year-old male presented with headache and nausea. The preoperative magnetic resonance images revealed a well circumscribed mass in the fourth ventricle that exhibited a low intensity on T1-weighted images and homogeneously enhanced with gadolinium. Vertebral angiogram revealed a tumor stain supplied from the choroidal branches of the posterior inferior cerebellar artery. The tumor was totally resected through a midline suboccipital approach. Histologically, the tumor was composed of spindle-shaped cells growing in fascicles within a collagenous matrix. Immunohistochemical staining demonstrated vimentin and the CD34 positivity of tumor cells. Solitary fibrous tumor is a newly described entity, which should be considered in the differential diagnosis for dural-based lesions.     

Solitary fibrous tumor of the scalp: a case report

The solitary fibrous tumor is a rare tumor, ubiquitous, mesenchymatous essentially affecting serosal surfaces. The location in the scalp is exceptional. We report a case of tumor in left occipital scalp discovered after recurrence of a tumor initially taken for a lipoma. The motive for consultation was mainly aesthetic. The pathological examination is the main element of diagnosis. The assumption is based on a large lumpectomy and an extended and regular clinical monitoring. The forecast is favourable with a decline of one year. However, relapses may occur in the long-term and there are malignant forms.     

Solitary fibrous tumor of the pelvis: an uncommon soft-tissue tumor. A case report

A rare case of Solitary fibrous tumor (SFT) of the pelvis is reported. A 76-years-old man presented with a low abdominal pain, acute urine retention and constipation. Imaging studies (US, CT MR) showed an 17 x 10 x 9 ovoid mass in the pelvis, dislocating bladder and rectum. Finally, trans-rectal needle biopsy suggested the diagnosis of SFT. En bloc excision of tumor and rectum (because of strong adhesions) was performed. Histological examination showed spindle and fibroblastic-like cells dispersed in collagenous areas with positive stains for CD34, bcl-2, CD99 and it confirmed diagnosis of SFT. No postoperative complications occurred, only vesico-sphincter dyssynergia was found by urodynamics. After 5 years, patient is disease-free. SFT is, usually, benign tumor with slow growth and excellent prognosis. Complete surgical resection is the only curative treatment. However, 10-15% of SFT are malignant and histological findings cannot always predict clinical behaviour. For this reason, careful and long term follow-up is necessary after surgery.