Hungarian Radiology

[Radiological diagnostics in head and neck malignancies - Onco Update, 2006]

GŐDÉNY Mária, BODOKY György

JUNE 20, 2007

Hungarian Radiology - 2007;81(03-04)

[Imaging plays a crucial role in defining disease burden and thus therapy planning in head and neck cancer (HNC). Lately accuracy of pretreatment staging has become critical since non-surgical therapy has become a widely accepted treatment possibility. The referring clinician is responsible for accurate data collection, pretreatment staging, evaluation of therapy response and post-treatment evaluation of the HNC. Correctness of these highly depends on the expertise and experience of the evaluating radiologist therefore being familiar with the latest literature is essential. This article is a review of papers published in 2005 and 2006 focusing on the clinical significance of the latest imaging results in head and neck cancer diagnostics.]

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Hungarian Radiology

[The quality control of radiological equipments in Hungary]

PELLET Sándor, PORUBSZKY Tamás, BALLAY László, GICZI Ferenc, MOTOC Anna Mária, VÁRADI Csaba, TURÁK Olivér, GÁSPÁRDY Géza

Hungarian Radiology

[Investigation of colon transit with radiopaque m]

WENINGER Csaba, KIRÁLY Ágnes

[The constipation is a frequent disorder, which often requires gastroenterological examination. Colon transit study and defecography are indicated in case of making difference between slow colon transit time and outlet obstruction. The method, the mode of administration of the radiopaque markers and the evaluation of the radiological study are discussed. Radiopaque markers ingested on the first day are followed by abdominal X-ray taken at regular times. The normal value of the colon transit time is less than 70 hours. The etiology of constipation has to be clarified by functional examinations, since the treatment of outlet obstruction is different from slow transit constipation. To determine the large bowel transit time is necessary also in the differential diagnosis of slow colon transit. The method is a simple, reliable and easily reproducible.]

Hungarian Radiology

[Sonographic appearance of the cytostatic therapyrelated hepatic injury]

JÓKÚTI László, VARGA Edit, KARÁDI Zoltán, KOVÁCS GÁBOR

[INTRODUCTION - The correlation between biochemical parameters and sonographic appearance of the liver in children and young adults receiving cytostatic therapy was investigated. PATIENTS AND METHODS - 104 (54 male, 50 female) patients at the hemato-oncologic unit of 2nd Department of Pediatrics, Semmelweis University Budapest were enrolled into this prospective, single-blind, uncontrolled study: patients’ ages were between 2.0 and 32.7 years (mean 12.2 yrs, ± SD 5.7). 69 patients received chemotherapy for acute lymphoblastic leukemia (ALL), 35 patiens for osteogenic osteosarcoma (OSC). The time interval between the initiation of the cytostatic therapy and the examination was between 1 month and 16 years (mean 3.9 yrs). Ultrasonography was performed after 5-8 hours of fasting, without sedation. Echogenicity, distal attenuation of liver parenchyma and Doppler waveforms of the hepatic vein branches were evaluated. Alanine-aminotransferase (ALT) and gamma-glutamyltransferase (GGT) activity were measured in peripheric blood samples. Statistical correlation was analysed between sonographic appearance and biochemical parameters of the liver. RESULTS - 35 patients had at least one sonographic abnormality: of these, 9 had elevated enzyme activity. Among the 69 patients with normal ultrasound findings, only 2 had increased enzyme activity (Chi square test, p=0.001). When tested against enzyme activity, echogenicity and attenuation showed significant (p=0.002 and p=0.01, respectively), Doppler waveform in the hepatic vein branches showed marginally significant correlation (p=0.05). All three ultrasound parameters had low sensitivity regarding the elevation of enzyme levels, however attenuation and hepatic vein waveform proved to be specific (both 94%) for enzyme level elevation and all three showed high negative predictive values (96%, 93% and 92%, respectively). When combining all three sonographic parameters in a single variable, correlation was even higher (p=0.001), sensitivity became acceptable (82%) and negative predictive value increased further to 97%. CONCLUSIONS - The authors conclude that a correlation exists between three simple sonographic indicators (echogenecity, distal attenuation, Doppler waveforms of the HVs) and liver injury detected by biochemical parameters. Due to the low sensitivity of the ultrasound parameters to confirm of the presence of diffuse liver injury is not possible. However, the combined use of the ultrasound and biochemical parameters a good negative predictive power can be achieved and therefore this is a useful tool in the follow-up for hepatic status.]

Hungarian Radiology

[First Central and Eastern European Workshop on Quality Control, Patient Dosimetry and Radiation Protection in Diagnostic and Interventional Radiology and Nuclear Medicine]

GÁSPÁRDY Géza

Hungarian Radiology

[Imaging of mesenterial panniculitis - Case report]

KOVÁCS Anita, KISS Ildikó, PALKÓ András

[INTRODUCTION - Mesenterial panniculitis is a rare benign disorder, however it is important to be familiar with, because of the difficulties in differential diagnosis. Authors describe the characteristic imaging signs of the disease based on their two cases. CASE REPORTS - Two male patients (72 and 62 years old) presented with uncertain abdominal pain and weight loss. Acute pancreatitis, chronic gastritis and duodenitis are noted in their case history. The laboratory parameters were normal and the physical examination revealed a palpable epigastrial terime in both patients. Abdominal ultrasound and CT examinations depicted different degree of mesenterial infiltration with lymph node enlargement. Histological analysis of the biopsy sample proved the process to be benign in the first patient. The mass was surgically removed in the second one and histology proved mesenterial panniculitis. CONCLUSION - Mesenterial panniculitis is a benign, chronic non-specific inflammatory disorder. Its appearance may simulate malignant diseases, thus making differential diagnosis is important. Abdominal ultrasound, CT and result of image guided biopsy play an important role in the diagnosis, in case of which conservative therapy and regular follow-up is sufficient.]

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[Metastasis of the large bowel from gastric signet-ring cell carcinoma - Case report]

TÓTH Géza, LUKOVICS Péter, LÁHM Erika, KOVÁCS Margit

[INTRODUCTION - Metastatic tumor of the colon is extremely rare. It could mimic inflammatory bowel disease or ischemic colitis. CASE REPORT - A 59-year-old female underwent gastrectomy because of primary signet-ring cell carcinoma of the stomach in 1999. In November 2003 follow-up CT detected circular and segmental thickening of the wall of the transverse colon with significant targetlike contrast enchancement of the inner layers. Colonoscopy was performed but due to the significant stenosis of the transverse colon, the tumor was not properly examined. Biopsy was taken from the beginning of the stenosis, which did not prove neither specific inflammation or malignancy. Barium enema and virtual colonoscopy was performed. There was mild dilatation of the stenotic part and mucosa seemed to be intact by virtual colonoscopy. Barium enema showed significant stenosis and polypoid alteration of the mucosa in the right part of the colon. There was also an asymmetric bowel wall thickening of the flexura lienalis. Because of subileus the patient was operated on, and an extended right hemicolectomy was made. The histology of the specimen verified secondary signet-ring cell tumor of the colon. CONCLUSION - In case of multiple circular and segmental thickening of the wall of the colon, with striking thickening of the enchancing inner layer with decreased contrast enhancement in the outer layer (target pattern) on the CT, the metastasis of the large bowel should be considered.]

Clinical Neuroscience

[MR investigations in stroke]

KENÉZ József, BARSI Péter

[In the article digital imaging methods are presented with special emphasis on the use on diagnostics of cerebral circulation studies. Recently, fundamental changes have happened in this field, concerning especially the MR investigations. These changes have influenced the therapeutic strategies of ischaemic stroke. Authors give the theoretical background on the diffusion and perfusion MR imaging, emphasising the importance of their “mismatch” and its impact in the estimation of the outcome of ischaemic events. More recently, new, controversial facts arose, regarding the reasons of the introduction of the theory of so called “negative” and “positive” mismatches. As a consequence, a level of uncertainty took place in the judgement of prognostics. The leading institutions are searching the way to solve the problem which seems to be the quantitative evaluation of the diffusion, perfusion and mismatch data. The advent of the multislice spiral CT with very fast imaging and the importance of CT investigations increased. With this new kind of equipment, even perfusion studies can be performed using iodinated contrast medium.]

Hungarian Radiology

[Significance of ultrasound examination in acute abdominal attack of hereditary angioneurotic oedema]

FARKAS Henriette és munkatársai

[INTRODUCTION - Hereditary angioneurotic oedema (HANO) is a rare cause of ascites. As acute abdominal attacks of the disease can mimic surgical emergencies, the prompt and accurate diagnosis is essential. This study was undertaken to evaluate the usefulness of abdominal ultrasound examinations in the differential diagnosis. PATIENTS AND METHODS - Seventy patients with HANO were followed up for almost a decade. All patients presenting with an acute oedematous attack underwent abdominal ultrasound, which was then repeated 24 and 48 hours after appropriate therapy. RESULTS - 22 patients with acute oedematous attacks with abdominal complaints severe enough to justify hospital admission occurred in the study population. Abdominal ultrasound performed during the attack showed oedematous thickening of the intestinal wall in 80 per cent of cases and invariably demonstrated the presence of free peritoneal fluid in all patients. Rapid symptomatic relief achieved by treatment was accompanied by the significant regression of ultrasound abnormalities. CONCLUSIONS - Demonstration of transitory ascites by abdominal ultrasound is a clue to the diagnosis of an acute abdominal attack of HANO. The possibility of HANO should always be considered whenever unexplained abdominal pain returns with or without ascites.]

Clinical Neuroscience

[Positron emission tomography in presurgical localization of epileptic foci]

JUHÁSZ Csaba

[The success of cortical resection for intractable epilepsy of neocortical origin is highly dependent on the accurate presurgical delineation of the regions responsible for generating seizures. In addition to EEG and structural imaging studies, functional neuroimaging such as positron emission tomography (PET) can assist lateralization and localization of epileptogenic cortical areas. In the presented studies, objectively delineated focal PET abnormalities have been analyzed in patients (mostly children) with intractable epilepsy, using two different tracers: 2-deoxy-2-[18F]fluoro-D-glucose (FDG), that measures regional brain glucose metabolism, and [11C]flumazenil (FMZ), that binds to GABAA receptors. The PET abnormalities were correlated with scalp and intracranial EEG findings, structural brain abnormalities, as well as surgical outcome data. In patients with extratemporal foci and no lesion on MRI, FMZ PET was more sensitive than FDG PET for identification of the seizure onset zone defined by intracranial EEG monitoring. In contrast, seizures commonly originated from the border of hypometabolic cortex detected by FDG PET suggesting that such areas are most likely epileptogenic, and should be addressed if subdural EEG is applied to delineate epileptic cortex. In patients with cortical lesions, perilesional cortex with decreased FMZ binding was significantly smaller than corresponding areas of glucose hypometabolism, and correlated well with spiking cortex. Extent of perilesional hypometabolism, on the other hand, showed a correlation with the life-time number of seizures suggesting a seizurerelated progression of brain dysfunction. FMZ PET proved to be also very sensitive for detection of dual pathology (coexistence of an epileptogenic cortical lesion and hippocampal sclerosis). This has a major clinical importance since resection of both the cortical lesion and the atrophic hippocampus is required to achieve optimal surgical results. Finally, the author demonstrated that in patients with neocortical epilepsy, FDG PET abnormalities correctly regionalize the epileptogenic area, but their size is not related to the extent of epileptogenic tissue to be removed. In contrast, complete resection of cortex with decreased FMZ binding predicts good surgical outcome suggesting that application of FMZ PET can improve surgical results in selected patients with intractable epilepsy of neocortical origin.]

LAM KID

[Infective sacroiliitis]

BARTHA Attila

[INTRODUCTION - Pyogen infection of the sacroiliac joint occurs rarely in rheumatological practice. Its clinical symptoms are diverse, so the diagnosis is often made late. CASE REPORT - The author presents a case of a 67-year-old woman. The patient did not have any major diseases nor any predisposing factors for infection. Five days after doing hard physical work she felt strong pain irradiating from her lower back to the right lower limb. She was referred to the Department of Neurology with the diagnosis of right lumbar radiculopathy. She was primarily examined for tumours because of her high red blood cell sedimentation rate and CRP level and her inability to walk. The correct diagnosis was set up on the basis of MRI examination: infective sacroiliitis on the right side, which has spreaded to the adjacent tissues. USguided biopsy was unsuccesful, so empiric antibioitic treatment was started. The patient was discharged from hopsital after 35 days and continued clindamycin therapy at home. At control examination 6 month later she did not have any symptoms or complaints and laboratory examinations did not indicate inflammatory activity. MRI examination still showed an extensive oedema. CONCLUSION - Pyogen arthritis should be considered even in the absence of fever, leukocytosis and predisposing factors. By making the correct diagnosis and starting long-term antibiotic therapy in time, joint destruction is preventable and the patient is curable.]