CT findings in tuberculous otomastoiditis. A case report

Purpose:
Otomastoiditis is a rare but important manifestation of tuberculosis and is well recognizable when information on its clinical course is considered in connection with the radiographic changes.
Material and Method:
A patient with a clinical history of chronic otorrhea, resistant to conventional therapy but without dramatic symptoms, was referred for CT examination.
Results:
CT revealed widespread soft tissue densities in the tympanic cavity and in the mastoid process, with bone erosions in the latter. Surgery and bacteriology confirmed the diagnosis of Mycobacterium tuberculosis infection.
Conclusion:
CT evidence of widespread bone destruction without clinical signs of aggressive infection should suggest the diagnosis of a mycobacterial process. Early treatment is essential in order to avoid propagation of the disease and lasting loss of function.     

Intradural primary chondroblastic osteosarcoma: case report.

We report a rare case of intradural primary osteosarcoma (IPOS) in a 74-year-old man with aphasia and right-sided hemiparesis. Radiologic workup revealed a large, partially calcified, left-sided frontotemporal intracranial mass lesion. At surgery, the tumor was found to be entirely intradural; it involved the brain and subarachnoid space of the left sylvian fissure. The adjacent dura was uninvolved. Neuropathologic findings confirmed the diagnosis of chondroblastic osteosarcoma. To our knowledge, this is the sixth reported case of IPOS and the first reported case of the chondroblastic subtype.     

脑原发性淋巴瘤的CT和MRI诊断

脑原发性淋巴瘤是少见的恶性肿瘤,占颅内原发肿瘤的0.8%~1.5%[1],但近年来发病率有逐渐上升的趋势。国内外有关文献脑原发性淋巴瘤的报道虽多,但由于其影像学特点变化多样,误诊率仍然较高。本研究通过对14例脑原发性淋巴瘤的病例的CT、MRI影像学表现的分析,以提高CT、MRI对脑原发性淋巴瘤的诊断符合率。     

CT findings of a large primary pulmonary myxoid sarcoma: A case report

Primary pulmonary myxoid sarcoma (PPMS) is an extremely rare malignant mesenchymal tumor of the lung, with only less than 40 cases reported. We described a case of a 64-years-old man with a mass on the medial and lower lobe of the right lung confirmed as a primary pulmonary myxoid sarcoma on biopsy. Diagnosis of this tumor remains challenging because of its nonspecific clinical and imaging characteristics. This study emphasizes CT finding to improve the understanding of PPMS.     

CT and MRI findings of intraosseous schwannoma of the mandible: a case report

We report the radiographical findings of a rare case of intraosseous schwannoma of the mandible. The tumour that presented as a unilocular, well-defined, radiolucent lesion on plain radiography was located in the molar region. On CT, the tumour was a well-demarcated mass with no periosteal reaction and no destruction of the bone cortex. Destructive changes in the cortical wall of the mandibular canal by the tumour were observed on CT, but no evidence of dilatation and shift in the inferior mandibular canal was seen. MR imaging revealed that the mandibular canal was encased by the tumour as a solid mass without cystic parts. The signal intensity of the tumour was non-specific on MRI. Characteristics of intraosseous schwannoma in the mandible are the encasement of the canal by a well-demarcated tumour without periosteal reaction and the destruction of mandibular bone cortex. The destructive change of the inferior mandibular canal can be observed on CT and MRI. However, a biopsy is necessary to make the final diagnosis because of the non-specificity of the findings.     

Radiographic, CT, and MRI findings in primary pulmonary angiosarcoma.

We report a rare instance of primary pulmonary angiosarcoma presenting as a large solitary mass in the left upper lobe with mediastinal invasion. In particular, we emphasize the magnetic resonance (MR) imaging features, which included a markedly heterogeneous pattern consisting of hyperintense areas scattered throughout a background of intermediate signal intensity, rendering the lesion a cauliflower-like appearance especially on T2-weighted images. Being unreported so far in primary pulmonary angiosarcomas, these distinct MR imaging findings may be helpful in the differentiation of these neoplasms from lung cancers.     

Correlative CT, MRI and histological findings of hepatic Echinococcus alveolaris: a case report.

Diagnosis of liver infestation by Echinococcus alveolaris (EA) is based on serologic, sonographic and CT findings. Literature review yielded only one report discussing the MRI findings of hepatic EA infestation. In this report, we present a case of hepatic EA infestation with its correlative CT, MRI and histological findings. CT showed hypodense mass involving more than half of the liver with rim and central calcifications. MRI revealed hypointense signal of the infiltrative mass on both T1- and T2-weighted images. On MRI, the portal vein branches were seen coursing through the lesion. Neither CT nor MRI demonstrated any contrast enhancement of the mass. On the histological examination, abundant fibrous and hyalinized tissue surrounding multiple small cysts were observed. MRI may provide invaluable information in the diagnosis of EA infestation of the liver, either by disclosing the infiltrative pattern of infestation without significant effect to vascular structures, or by the signal characteristics.     

Mesenteric panniculitis: findings on CT, MRI, and angiography case report

The computed tomography (CT), magnetic resonance (MR), and angiographic features of a case of mesenteric panniculitis are presented. The MR characteristics of this rare disorder have not previously been reported. The value of MR in arriving at the preoperative diagnosis of this disorder is discussed.     

原发性肝类癌的CT及MRI表现

目的 探讨原发性肝类癌的CT及MRI表现.方法 回顾性分析2003年12月至2008年11月间11例经手术病理证实的原发性肝类癌患者资料.4例行CT检查,8例行MRI检查,分析其影像表现特征.结果 11例中肿瘤多发2例,表现为2个或2个以上的结节状病灶,其余9例均为单发.CT检查4例患者病灶均表现为平扫边界清楚低密度,中心可见不规则更低密度区;增强后动脉期病灶实质部分不均匀强化,中心更低密度区无强化,门静脉期及延迟期病灶边缘仍轻度强化,强化程度较动脉期减低,中心坏死区始终无强化.MRI 8例患者中7例T_1WI表现为边界清楚的不均匀低信号,T_2WI病灶呈高信号,中心可见不规则低信号;增强后动脉期病灶边缘不均匀强化,病灶中心可见不规则无强化低信号区,门静脉期及延迟期病灶边缘仍轻度强化,边缘显示不清,病灶中心无强化低信号区范围较动脉期缩小.1例患者T_1WI表现为边界清楚的囊状低信号影,囊内可见高信号,T_2WI病灶呈高信号;增强后动脉期病灶边缘不均匀强化,门静脉期及延迟期呈低信号.结论 平扫和动态增强CT扫描及MRI能反映原发性肝类癌的影像特点,具有一定特征性.     

CT and MRI findings of a solitary extramedullary plasmacytoma of the oropharynx: case report

We report a case of solitary extramedullary plasmacytoma (SEP) of the oropharynx. A 53-year-old man presented who had had bloody phlegm and a sore throat for a few days. A mass was endoscopically detected in his right posterior oropharyngeal wall, and biopsy revealed a neoplasm consisting of a uniform population of plasma cells. Computed tomography (CT) showed a broad-based papillary soft tissue density mass projecting into the oropharynx from the right posterior wall of the pharynx, and post-contrast CT showed marked enhancement of the tumor. The tumor showed slightly higher signal intensity compared with surrounding muscle on MR Tl-weighted images (T1WI) and high signal intensity on MR T2-weighted images (T2WI). The mass showed homogeneous enhancement on post-contrast T1WI. Further clinical examination showed an absence of multiple myeloma (MM). The patient was diagnosed as having SEP. Following radiation therapy, a reduction in tumor size was observed. Although SEP is a rare tumor, it should be included in the differential diagnosis of tumors of the oropharynx because of its imaging similarities to other, more common malignant tumors, such as squamous cell carcinoma and lymphoma.     

肺部恶性纤维组织细胞瘤的CT及MRI表现

目的 探讨肺部恶性纤维组织细胞瘤的CT、MRI特征.方法 回顾性分析5例经手术病理证实的肺部恶性纤维组织细胞瘤患者的影像学资料,3例行CT,2例行MR检查.结果 4例来自于肺内,其中2例呈边缘明显强化方式,1例强化不明显,1例呈不均匀强化,2例侵犯周围组织,3例纵隔淋巴结转移,1例远处转移,2例有囊变、液化坏死、出血改变,2例肿瘤T1WI、T2WI上均呈中等不均匀信号,可见液化、坏死、出血.1例来自于胸膜,表现为胸壁下多发结节,边界清楚.结论 恶性纤维组织细胞瘤的影像学表现具有多样性,CT和MRI对于肺部恶性纤维组织细胞瘤的定位、病变范围及周围组织侵犯情况的评价具有重要价值.     

胰腺原发性恶性纤维组织细胞瘤CT和MRI表现一例

患者男,76岁.体重下降半年,体检B超发现胰腺占位性病变.体检:中腹部可触及一个9.0 cm×10.0 cm的质硬肿块,活动度差,无明显压痛.实验室检查未发现明显异常.     

儿童胸肺型合并脑型肺吸虫病的CT和MRI表现

目的:研究胸肺型和脑型肺吸虫病的CT及MRI影像学特点,提高对本病的认识.方法:4例患儿经实验室检查确诊肺吸虫痛,均行胸部CT检查及脑部MR平扫加增强检查,回顾性分析其CT及MRI影像表现并结合文献总结其影像特点.结果:肺部表现4例均见胸腔积液并胸膜下肺结节;3例见肺内蜿蜒条状密度增高影;2例见肺内斑点状模糊影;2例见肺内小结节,其中1例结节边缘见弯曲条状影,状如“蝌蚪”.脑部表现3例见颅内大小不等出血灶;2例见多发结节状或环形强化病灶,分布于脑实质及脑室内;2例见“隧道征”;所有病灶周围均有大小不等水肿信号.结论:胸腔积液合并胸膜下肺结节、肺内蜿蜒条状密度增高影及状如“蝌蚪”的小结节是胸部较特征性的CT表现.脑实质及脑室内多发结节状或环形强化病灶及“隧道征”为脑部较特征性的MRI表现.胸部和脑部病变均具有多发及迁移性.     

Hepatic angiosarcoma. CT and MRI aspects. A case report and review of the literature

The authors report a case of hepatic angiosarcoma revealed by massive haemoperitoneum. They analyse the CT and MRI features of this rare tumour and recall the difficult diagnostic problems raised by cavernous angiomas. The new MRI diagnostic criteria must be recognized, but do not constitute formal proof of the diagnosis.     

A case of ganglioneuroma with fatty replacement: CT and MRI findings

We report a rare case of posterior mediastinal ganglioneuroma with fatty replacement together with its appearance on CT and MRI and suggest adding this entity to the differential diagnosis of fat-containing posterior mediastinal masses.     

A case of deep soft tissue leiomyoma: CT and MRI findings

A 25-year-old man presented with a firm tissue mass of the right elbow and intermittent pain. CT showed a dumbbell-shaped soft tissue mass with foci of dense calcification in the muscular layer of the triceps brachii muscle and subcutaneous tissue. The tumor showed slightly higher signal intensity on T1-weighted images and markedly higher intensity on T2-weighted images compared with the surrounding muscle. Prominent enhancement was present after the intravenous injection of Gd-DTPA. Histopathological examination of the resected specimen revealed a deep soft tissue leiomyoma.     

混合型肺癌的CT的表现

混合型肺癌是一种少见的组织类型,本文回顾分析了28例混合型肺癌的CT表现及病理基础,并探讨有助于诊断的征象。1材料与方法1.1一般资料收集2008年2月～2011年6月间经CT检查、手术病理证实混合型肺癌28例共29枚病灶,1例为双发。男13     

Ultrasonography and CT findings of a dermoid cyst of the cecum. A case report

We report the US and CT findings of a dermoid cyst of the cecum, which is a very uncommon location for this entity. Pathological correlation and differential diagnosis are briefly discussed.     

原发性下腔静脉平滑肌肉瘤的CT与MRI表现分析(附2例报告并文献复习)

原发性下腔静脉平滑肌肉瘤（primaryleiomyosarcoma of the inferior vena cava,PIVCI。MS）是一种少见的恶性肿瘤,起源于静脉壁平滑肌。自1871年Perl首先报道,文献报道不足300例,且多数为个案报道。国内亦仅有少数报道,郑伟等。报道1986～2006年中国人民解放军总医院共收治14例为国内最多报道。笔者分析2例经病理证实的PIVCLMS的CT及MRI检查结果,旨在提高对本病的诊断与鉴别诊断水平。