霉菌性鼻窦炎的CT诊断

目的探讨霉菌性鼻窦炎CT特征性表现及诊断价值。方法回顾性分析25例经手术病理证实的霉菌性鼻窦炎CT表现。结果25例主要CT表现为病变均为单侧性,位于上颌窦或以上颌窦为主,累及其他鼻窦;病变窦腔密度不均匀增高,内有局灶性点状、絮状(9例),砂粒状、小斑片状(16例)高密度影;可有窦壁骨质破坏(13例)。结论霉菌性鼻窦炎在CT表现有特异性,CT对该病的诊断有很高的价值。     

CT诊断真菌性鼻窦炎100例分析

目的回顾性总结真菌性鼻窦炎CT影像表现,并结合临床,探讨CT检查对诊断真菌性鼻窦炎的临床价值。方法收集100例确诊为真菌性鼻窦炎的病人资料并结合临床检查结果,与CT检查进行分析比较。鼻窦CT扫描采用骨窗和软组织窗扫描。结果 100例患者均为单侧鼻窦发病,其中真菌球型68例,慢性侵袭性真菌性鼻窦炎4例,变应性真菌性鼻窦炎28例。CT扫描影像特点为鼻窦腔散在较均匀毛玻璃特征或极不规则的线状,有星状分布的钙化点;伴不同程度骨质吸收或结构不清;窦壁骨质侵蚀15例。病变延伸到邻近结构3例,其中1例累及眼眶。有2例侧颅底骨质吸收。鼻腔或鼻窦内分布黏蛋白与CT显示毛玻璃样高密度影一致。结论真菌性鼻窦炎的鼻窦CT扫描显示与其他鼻窦炎不同。CT检查有助于准确诊断真菌性鼻窦炎。     

真菌性蝶窦炎的影像诊断和鉴别诊断

目的:探讨蝶窦真菌感染的影像学特征、诊断和鉴别诊断。方法:回顾性分析11例经病理证实的真菌性蝶窦炎的临床和影像学检查资料。结果:CT与MRI表现为窦腔内结节样软组织密度影8例(73%);伴有沙粒状、小条片状、团块状的钙化6(45%)例;累及后组筛窦5例(45%),伴窦腔扩大7例(64%);局限性骨质增生和破坏4例(36%)。结论:真菌性蝶窦炎具有较特征性影像学表现,鉴别诊断要考虑一般性炎症、息肉、粘液囊肿和肿瘤。     

变应性真菌性鼻窦炎的CT诊断

目的 探讨变应性真菌性鼻窦炎的CT表现及其诊断价值。方法 回顾性分析12例经术后组织病理证实的变应性真菌性鼻窦炎，均经过CT检查。主要临床表现包括奶酪状黏涕、鼻阻塞感及鼻区痛。鼻内镜检查：12例受累侧鼻腔内均可见息肉、黏膜水肿，鼻窦腔内均见真菌分泌物。结果 变应性真菌性鼻窦炎累及半组鼻窦3例，累及全组鼻窦9例。CT平扫12例表现为鼻窦黏膜增厚；窦腔内充满软组织影，伴有不规则条状、匍行性或斑片状高密度影(软组织窗)，边界清楚，也可伴有云雾状高密度影(骨窗)，边界模糊；CT值80～110HU，平均92．5HU。11例鼻窦膨胀，窦壁骨质变形、变薄10例，8例窦壁骨质侵蚀。8例病变延伸到邻近结构，其中4例累及眼眶，2例累及颅内，2例同时累及眼眶和颅内。结论 半组或全组鼻窦充满软组织影，伴有多发典型的高密度影是诊断本病的特征性CT征象，根据此征象可能首先提出本病的诊断。CT不但可以准确显示病变累及的范围，也能够帮助与其他病变进行鉴别。     

非侵袭性真菌性上颌窦炎的CT诊断

目的总结非侵袭性真菌性上颌窦炎的CT表现特征,以提高本病的正确诊断率。方法对经手术、病理证实的50例非侵袭性真菌性上颌窦炎的CT表现进行回顾性分析。结果 43例病变累及一侧上颌窦,7例累及同侧筛窦及鼻腔。病变窦腔内充以软组织密度影,内见斑点斑块状钙化36例,窦腔高密度影内见气泡影19例。34例见上颌窦窦壁骨质改变,窦壁骨质增生硬化26例;窦壁骨质吸收破坏24例。结论非侵袭性真菌性上颌窦炎具有特征性的CT表现,CT对该病的诊断有较高价值。     

Periantral soft-tissue infiltration and its relevance to the early detection of invasive fungal sinusitis: CT and MR findings.

PURPOSEOur goal was to illustrate the relevance of periantral soft-tissue infiltration to the early diagnosis of invasive fungal sinusitis and to describe variations in the appearance of normal periantral soft tissues.METHODSWe reviewed two cases of pathologically proved invasive maxillary fungal sinusitis in which the sole imaging finding suggestive of invasive disease was periantral soft-tissue infiltration. Variations in the CT appearance of normal periantral soft tissues were studied in 112 patients by assessing the appearance of the fat planes along the anterior and posterior bony antral walls and by noting the presence of infraorbital and distal internal maxillary artery branch vessels within the anterior and posterior periantral fat planes, respectively.RESULTSNone of the 112 patients had findings that suggested, or that could mimic, soft-tissue infiltration in the anterior periantral soft tissues. In only one (1%) of the 112 patients was there a loss of visibility of the posterior periantral fat plane that was not clearly attributable to the otherwise normal-appearing posterior periantral soft tissues.CONCLUSIONInfiltration of the periantral fat planes may represent the earliest imaging evidence of invasive fungal disease. When encountered as the sole radiologic finding, periantral soft-tissue infiltration should suggest the possibility of invasive fungal sinusitis in the appropriate clinical setting.     

Calcification in chronic maxillary sinusitis: comparison of CT findings with histopathologic results.

BACKGROUND AND PURPOSE: It is important to differentiate fungal from nonfungal sinusitis in order to determine the optimal treatment for chronic sinusitis. The purpose of this study was to describe the CT findings of calcifications in chronic fungal and nonfungal maxillary sinusitis. METHODS: Five hundred ten patients with pathologically proved chronic maxillary sinusitis were studied with unenhanced CT before undergoing sinonasal surgery. In 36 patients, the CT scans were reviewed retrospectively to ascertain the shape and location of intrasinus calcifications. RESULTS: Calcifications were found in 20 (51%) of 39 patients with fungal sinusitis and in 16 (3%) of 471 patients with nonfungal sinusitis. Direct histopathologic correlation was performed in two of 16 patients with nonfungal sinusitis who had intrasinus calcification. The location of intrasinus calcification was central in 95% of the patients with fungal sinusitis and peripheral in 81% of those with nonfungal sinusitis. Although calcifications with a nodular or linear shape were seen in both fungal and nonfungal sinusitis, fine punctate type calcifications were seen only in those with fungal sinusitis (50%) and round or eggshell type calcifications only in those with nonfungal sinusitis (19%). CONCLUSION: Intrasinus calcifications are different in location and shape between fungal and nonfungal maxillary sinusitis. Although intrasinus calcification is uncommon in nonfungal sinusitis, the CT finding of intrasinus calcification may be helpful for differentiating fungal from nonfungal maxillary sinusitis.     

变应性真菌性鼻窦炎累及眼部的CT诊断

目的 探讨变应性真菌性鼻窦炎累及眼部的CT表现。资料与方法回顾性分析6例经病理组织学证实的变应性真菌性鼻窦炎，均出现眼部症状，包括突眼5例，眼球移位4例，视力减退3例；鼻部主要症状为奶酪状黏涕、鼻塞。结果6例变应性真菌性鼻窦炎均累及双侧多个鼻窦。CT平扫示受累鼻窦窦腔充满软组织影，伴有多发条状、葡行性或斑片状高密度影(软组织窗)，边界清楚，也可伴有磨玻璃状高密度影(骨窗)，边界较模糊；鼻窦膨胀．窦壁骨质变形、变薄、连续中断。病变累及眼眶，4例侵犯眶内壁，1例侵犯眶上壁，1例同时侵犯眶内、上壁．与邻近眼外肌分界不清；眶尖容积变小2例，6例眼球均不同程度突出。结论双侧鼻窦充满软组织影，伴有条状或葡行高密度影是诊断本病的特征性CT征象，根据此征象可提出本病的诊断；本病进展期常侵犯眼眶，有时患者可能以眼部症状首先就诊，应引起临床及影像科医师的重视。     

CT and MRI features in Bipolaris fungal sinusitis

Bipolaris is an increasingly recognized cause of fungal sinusitis. Reports of imaging features are sparse. Our purpose was to review the imaging features in patients with Bipolaris fungal sinusitis. A review of our data showed seven patients with culture-proven Bipolaris fungal sinusitis. Computed tomography of the paranasal sinuses in all the patients and MRI in five patients were analysed for the location, nature, extent of the disease and density/signal characteristics on CT/MRI. The sphenoid and posterior ethmoid sinuses were most often involved (six of seven), followed by the anterior ethmoid sinus (five of seven), frontal sinus (four of seven) and maxillary sinus (three of seven) involvement. Five of seven cases had bilateral disease. Secretions were seen to fill the sinus and were expansile in nature in six of seven cases. Bony erosion was noted in all the patients. Air-fluid levels and bony sclerosis were rarely seen. Computed tomography showed central hyperdensity in all the cases. In the corresponding MR images (n = 5), the sinus contents appeared hyperintense on T1-weighted images and hypointense on T2-weighted images. Extension into the nasal cavity was found in six of seven cases. Five of seven cases had intracranial (extradural) spread. Intraorbital extension was seen in three of seven cases, with associated optic nerve compression in two. All the patients responded to surgical debridement, and systemic antifungal therapy was not required. Bipolaris fungal sinusitis typically presents with an allergic fungal sinusitis picture with expansile sinus opacification and bony erosions. There is central hyperdensity on CT scan, which appears hyperintense on T1-weighted and hypointense on T2-weighted MR images.     

CT imaging of fungal and nonfungal caseous sinusitis. A report of 50 cases

PURPOSE: Evaluate the contribution of CT for the diagnosis of caseous fungal and not fungal sinusitis, mostly of dental origin and often improperly called aspergillus sinusitis. MATERIAL: and methods. About 50 cases of caseous maxillary sinusitis, including 34 fungal sinusitis, the authors analyse the most important CT criteria. All patients underwent thereafter surgery, and the removal material was submitted to mycological investigations. RESULTS: Constructive and destructive modifications of the bone walls, fillings of sinus cavities and middle meatus are aspecific signs of chronicity. Dental origin foreign bodies and microcalcifications are more evocative but also non specific. Only the mycological investigation leads to the diagnosis of fungal and identifies by round fifty percent cases to the exact nature of fungal. CONCLUSION: There are no valid predictive criteria for fungal etiology by CT investigation.     

霉菌性上颌窦炎CT表现特征及误诊分析

目的探讨霉菌性上颌窦炎CT特征及误诊原因。方法分析26例霉菌性上颌窦炎患者CT和临床资料,总结CT特征,结合临床,分析误诊原因。结果霉菌性上颌窦炎CT多单侧受累（23例）。受累窦腔内不均匀密度增高影及其内斑点、团块及条状钙化（21例）,分布在中间15例,散在4例,边缘2例。窦壁增厚7例,窦壁骨质吸收4例。5例均误诊为一般上颌窦炎。结论与窦壁无关的腔内钙化是CT诊断较可靠特征。无钙化的霉菌性上颌窦炎应注意鉴别诊断,充分考虑临床和基础病。     

慢性侵袭性真菌性鼻窦炎的CT和MRI诊断

目的探讨慢性侵袭性真菌性鼻窦炎的CT和MRI表现及诊断价值。方法回顾性分析经手术、组织病理学证实的10例慢性侵袭性真菌性鼻窦炎的影像学资料。结果慢性侵袭性真菌性鼻窦炎发生于蝶窦5例，上颌窦3例，筛窦2例。CT表现：受累窦腔内充以软组织影，其中1例伴斑点状钙化；窦壁骨质破坏，同时伴周围骨质增生肥厚。MRI表现：T1WI为低信号（与脑实质比较，以下相同）2例，等信号7例；T2WI信号不均匀，7例以低信号为主，2例以高信号为主；增强后病变明显强化。侵犯邻近结构：眼眶9例，其中6例累及眶尖区，可见不规则软组织肿块影，与邻近眼外肌分界不清楚，7例包绕视神经；6例侵犯海绵窦，可见形态不一的软组织影；脑膜增厚、强化5例，3例侵犯脑实质，表现为水肿1例，肉芽肿2例；4例侵犯翼腭窝及颞下窝；3例鼻咽部软组织增厚；2例上颌神经和1例下颌神经明显增粗、强化；3例面颊部软组织肿胀；1例硬腭骨质破坏。结论窦壁骨质破坏伴硬化、MR T2WI低信号、易侵犯眶尖及海绵窦为本病特征性影像学表现。结合CT和MRI2种检查方法能够对本病的诊断、鉴别和治疗提供更可靠的信息。     

真菌性鼻窦炎的CT与临床诊断

目的：探讨真菌性鼻窦炎的CT和临床特征以及新的分类。资料与方法：回顾性分析经手术、病理证实的34例真菌性鼻窦炎患者的CT表现。结果：CT征象：（1）所有受累鼻窦均显示窦腔内密度增高影；（2）上颌窦内可见团块状或线样钙化影25例（73．5％）；（3）窦腔高密度湿浊影中有气泡影8例；（4）上颌窦骨质吸收、破坏5例，窦壁骨质膨胀或变薄3例。结论：真菌性鼻窦炎有特征性的CT表现，如窦腔内可见团块状高密度影、线样钙化影或气泡影等。CT扫描结合鼻内镜检查是诊断本病的重要手段。     

Radiological imaging of inflammatory lesions in the nasal cavity and paranasal sinuses

Paranasal sinus development and pneumatisation variants are described, and rhinosinusitis and different patterns of inflammatory sinonasal diseases are reviewed. Other inflammatory sinonasal diseases, e.g., fungal sinusitis, mucocele, pyocele and sinonasal manifestations in systemic diseases, are briefly described. Computed tomography (CT) is the primary modality in diagnosing and mapping suspected inflammatory sinonasal disease. Magnetic resonance (MR) imaging is complementary to CT if fungal sinusitis, pyocele or malignancy are suspected.     

Mucocele-like lesions of the sphenoid sinus with hypointense foci on T2-weighted magnetic resonance imaging

Lesions limited to the sphenoid sinus are relatively rare, and are obscure with respect to symptoms and physical findings. The differential diagnosis of isolated sphenoid sinus disease includes bacterial sinusitis, fungal infection, granulomatous inflammation, mucocele, and tumors. Magnetic resonance imaging (MRI) can provide information that closely reflects the composition of the tissues, sometimes permitting differentiation between pathologically distinct lesions showing similar density by computed tomography. We describe two cases involving mucocele-like lesions of the sphenoid sinus where preoperative MRI revealed a focus of hypointensity within the lesions. In both patients the sphenoid sinus was opened by a transnasal endoscopic approach, and diseased tissue corresponding to the hypointense area was removed under direct endoscopic vision. Histopathological diagnosis revealed colonies of Aspergillus in one case and necrotic granulation tissue without fungus in the other. We concluded that MRI is a crucial part of preoperative evaluation and that the transnasal endoscopic approach represents a safe and effective method for treating nonmalignant isolated sphenoid sinus disease.     

Fungal sinusitis: diagnosis with CT and MR imaging

Of 293 patients who underwent computed tomography (CT), surgery, and pathologic examination for chronic sinusitis, 25 had a diagnosis of fungal sinusitis at pathologic examination. Of these, 22 had foci of increased attenuation at CT (in four patients the mean representative CT number [Hounsfied unit] was 122.2 HU [SD, 8.2 HU]), and three did not. Of the 22, 19 patients (76%) met the CT criterion of this study (there was a 12% false-positive and a 12% false-negative diagnostic rate). Six of the 19 patients and one additional patient underwent magnetic resonance (MR) imaging, and all demonstrated remarkably hypointense signal characteristics on T2-weighted images. The findings at MR imaging therefore appear more characteristic of fungal sinusitis than the findings at CT. Furnace atomic absorption spectrometry showed increased concentrations of iron and manganese in mycetoma compared with their concentrations in bacterially infected mucus. This finding and the presence of calcium in the fungal concretion may explain the hypointense T2-weighted signal on MR images.     

弥漫性泛细支气管炎

探讨弥漫性泛细支气管炎（ＤＰＢ）的临床与影像学表现,以提高对本病的认识。材料与方法,对２例经病理证实并有完整的临床,实验室及肺功能检查,以及胸片及高辨率ＣＴ（ＨＲＣＴ）检查的弥漫性泛细支气 进行回顾分析。结果２例临床表现为咳嗽,咯痰及活动后气短。胸片示两肺弥漫性分布的小结节影及肺过度充气膨胀并两下支气管扩张,ＨＲＣＴ像上;①肺小叶中心性小结中节影;②小支气管和细支气管扩张;③支气管壁增厚。同时伴有     

霉菌性副鼻窦炎的CT特征

目的探讨霉菌性副鼻窦炎的CT特征。方法回顾分析20例经手术病理证实的霉菌性副鼻窦炎的CT表现。结果单侧副鼻窦发病18例,双侧副鼻窦发病2例,全部病变均累及上颌窦,累及2个以上副鼻窦腔8例,病变侵犯后鼻孔2例。霉菌性副鼻窦炎的CT表现主要为病变窦腔内充满软组织影,密度增高,不均匀,病灶内出现点状、条状钙化灶,窦腔骨壁增厚伴破坏,窦腔缩小。结论霉菌性副鼻窦炎的CT表现具有单侧发病为主,窦腔内点状、条状钙化灶,窦腔骨壁增厚伴破坏以及窦腔缩小等特征。CT可为诊断本病提供重要信息,但确诊需要组织学和细菌学检查。     

鼻窦真菌球的 CT 及磁共振成像表现

目的：探讨鼻窦真菌球的CT、磁共振成像（MRI）特征性表现及诊断价值。方法回顾性分析35例经手术、组织病理学证实的鼻窦真菌球的影像学资料,35例患者均做CT平扫,其中4例做MRI平扫加增强扫描。结果鼻窦真菌球的主要CT表现为：①病变为单侧性（100%）;②病变部位以上颌窦为主（80%）,部分突入同侧鼻腔;其次为蝶窦（14%）;③病变窦腔内不均匀软组织密度影充填,其内可见呈斑点状、云絮状或条带状高密度钙化影（89%）;④局限性骨质增生（74%）及破坏（9%）。 MRI表现为：病变中心T1WI呈等信号,T2WI呈低信号,周围增厚黏膜T1WI呈低信号,T2WI呈高信号,增强扫描病变中心不强化,周围增厚黏膜明显强化。结论病变内钙化影是本病特征性的CT征象,是诊断该病较为可靠的依据,CT检查是诊断本病的重要手段;MRI能显示病变内真菌球的范围,有助于诊断。     

The opacified maxillary sinus: CT findings in chronic sinusitis and malignant tumors

To distinguish opacification owing to inflammatory conditions (sinusitis) from that caused by nasomaxillary malignancy, computed tomography scans in 24 proved cases of sinusitis or tumor were reviewed for features related to sinus size, wall thickness, and character of bone erosion. An anatomic system was defined for classifying lesions according to the surface and type of bony involvement. In 12 cases of chronic maxillary sinusitis, the involved sinus was usually small and thick walled. The nasal surface of the involved sinus usually was eroded; often the orbital surface was eroded. The erosion was, however, short, irregular, and in the region of a normal dehiscence (semilunar hiatus or infraorbital canal) in all cases. The infratemporal surface was never eroded. In 12 cases of nasomaxillary neoplasia, the sinus was enlarged, one or more walls of the involved sinus being thinned and expanded. Bone erosion was present in all cases; erosion of the infratemporal surface was specific for neoplasia and significant as the usual site of recurrence.