Hungarian Radiology

[Cervical space occupying lesions: diagnosis at sonoelastography]

UJLAKI Mátyás, MAGYAR Péter, KARLINGER Kinga

DECEMBER 21, 2009

Hungarian Radiology - 2009;83(04)

[Among cervical (neck) region tumours, the thyroid lesions and the metastatic lymph nodes are the most detectable with conventional B-mode ultrasonography (US). The use of MRI and CT scans are limited because of the cost, and in case of CT, the radiation. With the introduction and constant development of sonoelastography, we have in our hands a new imaging procedure which is cheap, fast and harmless, yet giving more information to the examiner than conventional US. The elastographic examination of thyroid lesions is a more explored area than the elastographic visualisation of cervical lymph nodes. The ‘off-line’ elastography showed the highest accuracy allowing to calculate and analyse the strain index of cervical lymph nodes - strain index > 1.5 (85% sensitivity, 98% specificity) - but the ‘off-line’ processing of US elastograms is still too time consuming to be used in busy clinical settings. During the examinations of the thyroid gland both real-time and off-line processed strain imaging were used. An Italian team made a great leap forward as they standardized the degree of distorsion under the application of the external force. Then using the Ueno and Itoh elasticity score they achieved remarkable accuracy with real-time sonoelastography (P <0.0001). On the other hand only those organs are suitable for the US elastography characterization which can be slightly compressed, consequently the examination of a lesion with calcified shell cannot give useful information. Near to the pulsating arteries substantial amounts of decorrelation noise may appear and the examiner has to pay attention what structures are in the ROI box since the sonoelastography method assumes computations relative to the average strain inside the box. To detect a follicular carcinoma in the thyroid gland remains a big challenge. Despite of the limitations most researchers agree on the fact that sonoelastography is a perfect tool to use in addition to the conventional US examination. B-mode US combined with sonoelastography raised the accuracy in differentiation in all cases. With this modality it is also possible to deduce the number of cases when healthy lymph nodes or tissue peaces are taken for biopsy during FNAB.]

COMMENTS

0 comments

Further articles in this publication

Hungarian Radiology

[Residents here and over the rainbow]

LOMBAY Béla

Hungarian Radiology

[Clinical significance of nuclear scans in assessing function of thyroid nodules]

NAGY Dezső, BORBÉLY Katalin

[Functional and anatomical imaging plays an important role in the diagnosis and treatment of thyroid nodules presenting with continuously increasing number. In the first part of the paper the usefulness and recent trends of the classical nuclear medicine is discussed. The second part presents the interpretation of incidental thyroid lesions detected by PET-CT and the usefulness of PET in the evaluation of thyroid carcinoma.]

Hungarian Radiology

[Digital volume tomography - The use of cone beam CT in dentistry, oral and maxillofacial surgery]

PLACHTOVICS Márk

[Oral and maxillofacial radiology is a subspecialty with its own field of indication. The goal is to achieve proper diagnostic image quality with the minimal amount of harmful radiation. The most common acquisition techniques are the intraoral radiograph and the panoramic radiograph which result in an overview picture of the whole dental status of the patient or the full mouth survey with the higher doses of radiation indicated for periodontological treatment. The next level is the supplementary radiograph such as occlusal radiograph, transversal tomography (some panoramic radiographs have this option), lateral cephalometric projection, submentovertex view or Waters projection, etc. More over cone beam CT acquisition or digital volume tomography as is called. In case of some described special indications CT, MRI or sometimes US acquisition can be made. In the field of three dimensional radio-diagnostics, the CT has a superior place with well-known advantages for everybody, and the usage has been limited only by the high radiation dose. The main point of the acquisition is the image quality. The load of radiation only makes the field of indication narrow. In every day practice - because of the higher radiation load of each high quality CT - the pictures passing to the doctor are preferred to take with lower resolution and wider slices although the diagnostic value of this never reaches the wanted level. This is why this new acquisition system also mentioned in the title would be better known. This system works with reasonable low radiation coupling with the possibilities of the high fidelity 3D imaging focusing on the bony structures of the head and neck region. The purpose of this article is to give a comprehensive introduction to this method in use for more than a decade. From 2006 in Hungary we also have the option to use the technology.]

Hungarian Radiology

[Voiding sonocystography with ultrasound contrast material for the diagnosis of vesicoureteral reflux]

KIS Éva

[Voiding sonocystography with intravesical administration of ultrasound contrast agent is a sensitive method to detect vesicoureteral reflux without irradiation. Depicting microbubbles in the ureters and collecting system is feasible even with very small amounts of a second-generation ultrasound contrast agent, Sonovue. The reflux is graded (I-V) in a similar manner to the system used in voiding cystourethrography. In this article a detailed description is presented.]

Hungarian Radiology

[The effect of endovascular intervention in the presence of rare celiac trunk developmental anomalies]

VÁGÓ Andrea, SZENTPÉTERY László, FORRAI Gábor

[INTRODUCTION - The congenital absence of celiac trunk and it’s subtotal stenosis are rare abnormalities and often recognised only during digital substraction angiography (DSA). This anomaly is significant when there is a need to perform local intraarterial chemoperfusion or chemoembolisation of malignant hepatic tumours. In these cases the liver is supplied with arterial blood through the superior mesenteric artery and the gastroduodenal arch. The direction of blood flow in the common hepatic artery is changed ensuring the flow to the splenic and left gastric artery. In such circumstances it is not possible to obtain local chemotherapy. CASE REPORT - Two male patients (61 and 75 years old) are reported. Both patients were candidates for chemotherapy due to hepatocellular carcinoma (HCC). In these two cases the planned therapy was impossible because of a stenosis of the celiac trunk in one, and atresia of the celiac trunk in the other. CONCLUSION - The recognition of vascular anomaly prior to endovascular intervention significantly affects the planning of the therapy.]

All articles in the issue

Related contents

Hungarian Radiology

[Differential diagnosis of malignant cervical lymph nodes with real-time ultrasonographic elastography and Doppler ultrasonography]

ARDA Kemal, CILEDAG Nazan, GUMUSDAG Demir Pelin

[PURPOSE - Real-time ultrasonographic elastography is a new imaging technique which is used in characterizing the difference in hardness between pathologic and normal tissue. The purpose of our study was to evaluate the diagnostic performance of real-time ultrasonographic elastography and Doppler ultrasonography (DUS) individually and combined in differentiation of benign and malignant cervical lymph nodes (LN). PATIENTS AND METHODS - Fifty-one patients (12 men, 39 women) referred for fine-needle aspiration or surgical biopsies of suspected cervical lymph nodes were examined with gray scale ultrasonography, power DUS, and realtime ultrasonographic elastography. During DUS examination vascularity and resistance index (RI) values were evaluated. A five-group elastographic colour code pattern was used to evaluate the ultrasonographic elastograms for LN (pattern 1, an absent or a very small hard area; pattern 2, hard area <45%; pattern 3, hard area ≥45%; pattern 4, peripheral hard and central soft areas; pattern 5, hard area occupying entire solid component with or without soft rim). In addition, strains of LN and surrounding muscles were measured on elastograms, and the muscle-to-LN ratio (strain index) was calculated. Real-time ultrasonographic elastography and DUS results were compared with the final diagnosis obtained by fine-needle aspiration cytology analysis and/or by surgical pathology. The diagnostic potential of the examined criteria for malignancy was evaluated with univariate analysis and multivariate generalized estimating equation regression p≤0.05 indicated statistical significance. RESULTS - A strain index higher than 2.45 and colour pattern 4-5 had high utility in malignant LN classification with 93.8% sensitivity, 89.5% specificity (p<0.001). The results were significantly better than those obtained by using DUS characterization - that is, RI greater than 0.57 - which had 78.9% sensitivity (p<0.001). CONCLUSION - Real-time ultrasonographic elastography had 93.8% sensitivity and 89.5% specificity in the differentiation of benign and malignant cervical LN in patients referred for fine-needle aspiration or surgical biopsies with suspicion of malignancy. Real-time ultrasonographic elastography and DUS in addition to gray scale ultrasonography may improve the differential diagnosis of LN.]

Lege Artis Medicinae

[Calcitonin-secreting ovarian strumal carcinoid]

ÉSIK Olga, NÉMETH György, SZEPESHÁZI Károly

[On the basis of a case report, the clinical picture, pathologic characteristics and possible histogenesis of ovarian strumal carcinoid are discussed. A 3 mm strumal carcinoid, i.e. thyroid tissue intimately mixed with a calcitonin-secreting neuroectodermal tumour, was found in a mature ovarian cystic teratoma of a 38 year old woman. Although the thyroid component demonstrated a typical normal light microscopic appearance, no thyroglobulin and thyroxine were found immunohistochemically. Immunoreactive calcitonin was demonstrated within the tumour cells, even in the transitional zone of the biphasic tissue elements. No amyloid was detected. The argentaffin and argyrophilic reactions were negative. The close relationship between functionally imperfect thyroid tissue and a neuroendocrine marker-secreting tumour seems to be concordant with the theory of the existence of a pluripotential stem cell capable of differentiating multidirectionally.]

Hungarian Radiology

[Initial experiencies with sonoelastography in the examinations of breast diseases]

BORBOLA György, KARDOS Klára, TASNÁDI Tünde

[INTRODUCTION - Recently the ultrasound examination of the strain of circumscribed breast diseases has been introduced in the non-invasive breast examination, called sonoelastography. In Hungary, the authors had the first possibility to start with this method. They report on their initial experiences. MATERIAL AND METHODS - 61 circumscribed breast lesions in 41 patients sonoelastographic examinations were performed by Hitachi EUB 6500 system using a EZUTE3 real-time elastography unit. 48 lesions strain-ratio was calculated. 22 masses were verified pathologically (18 benign and 4 malignant) and 39 were considered benign upon the findings of clinical mammography and by follow up. They classified them on the basis of patterns published by Itoh, et al. The examinations were done by three experienced radiologists. The classification was done by consensus. RESULT - The all lesions which were verified pathologically or on the basis of examinations or follow ups were thought benign showed the pattern type from 1 to 3. Most of the cystic lesions showed the streaky cystic pattern. There were small number of malignant lesions in their material, and all of them gave the elastic pattern of 4 and 5. The numbers of strain-ratio of zone lesions with pattern 3 overlapping with the lesions of malignant ones. CONCLUSION - The first results showed that both the coloured elastographic pattern and the quantitative strainratio could be used well in the non-invasive diagnostic procedure of breast lesions. It could increase the diagnostic safety. Larger number of examinations are necessitated to find the exact diagnostic role of this method.]

Lege Artis Medicinae

[Primary non-hodgkin's lymphoma of the thyroid]

ÉSIK Olga, NÉMETH György, PÓCZA Károly

[Three cases of primary non-Hodgkin thyroid lymphoma from the past 30 years are reported, with particular regard to the diagnostics, staging, differential diagnostics, treatment, follow-up and survival. In stages IE and the relatively localized II E, surgical intervention (bilateral intra- or extra capsular thyroidectomy with selective neck node dissection) is indicated, followed by postoperative radiotherapy to the regional lymphatics (neck and upper mediastinum). Adjuvant chemotherapy is recommended be cause this is the only mode of treatment capable of reducing the occurrence of the distant relapses responsible for the majority of tumour-related deaths. The therapy in the advanced stages II E, III E and IV E does not differ essentially from the treatment of other nodal lymphomas: cytostatics are the main pillar of the therapeutic plan. The complementary use of irradiation is generally indispensable, but radical surgical intervention is no longer indicated.]