Ciste na bubrezima vrlo su čest i najčešće slučajan nalaz kod rutinskih radioloških pretraga, počevši od ultrazvuka do slikovnih metoda, kompjutorizirane tomografije (CT) i magnetske rezonancije ...(MR). Općenito se dijele na jednostavne i komplicirane. Jednostavne ciste su benigne i ne zahtijevaju daljnje praćenje niti liječenje. Ovoj kategoriji pripada velika većina cista. Kategoriji kompliciranih cista, međutim, pripada širok spektar cističnih promjena bubrega, od potpuno benignih do definitivno malignih. Bosniak klasifikacija korisna je i primjenjiva metoda u procjeni cističnih promjena na bubrezima. Proizašla je iz kliničkog iskustva s ciljem da slikovne morfološke karakteristike cističnih lezija bubrega posluže kao prediktivni faktor za pouzdanu kategorizaciju i razlikovanje „kirurških” od „nekirurških’’ cista. Iako se u dijagnostici i procjeni cista bubrega koriste i drugi modaliteti kao što su ultrazvuk i magnetska rezonancija, CT je slikovna metoda izbora. Standardni protokol čine prekontrastna (nativna) faza i postkontrastna arterijska i/ili parenhimna faza. Procjenjuje se veličina, smještaj unutar bubrega, oblik i gustoća ciste, broj i karakteristike septa ili kalcifikata te prisutnost postkontrastne imbibicije. Ultrazvuk se najčešće koristi kao screening metoda, a prikladna je i kod učestalih, ponavljajućih pregleda dok je magnetska rezonancija metoda izbora za mlađe pacijente, ima ključnu ulogu kod pacijenata s preosjetljivošću na jodno kontrastno sredstvo i one s kroničnom bubrežnom insuficijencijom, a sve češće se koristi i kao metoda izbora kada je nalaz CT pregleda nekonkluzivan.
CT urografija (CTU) je slikovna metoda specifično prilagođena oslikavanju i procjeni gornjeg mokraćnog sustava i mokraćnog mjehura. Visoka dijagnostička točnost u detekciji primarnih i recidivnih ...tumora urotela, razlikovanje malignih od benignih lezija, karakterizacija anatomskih varijacija i malformacija te procjena relevantnih patomorfoloških promjena u okolnim tkivima čine CT urografiju vrijednom metodom za oslikavanje mokraćnog sustava. Hematurija, inicijalna procjena proširenosti i praćenje tumora gornjeg mokraćnog sustava i mokraćnog mjehura najvažnije su indikacije za CTU. „Triple phase” i „split bolus” tehnike su najčešće korišteni CTU protokoli koje sačinjavaju nativna, nefrografska i ekskretorna faza, dobivene skeniranjem regije tri ili dva puta. CTU protokoli skeniranja su dizajnirani s ciljem ostvarivanja najbolje kvalitete slike te optimalne distenzije i opacifikacije mokraćnog sustava uz najmanju moguću dozu zračenja, u rasponu od 5 – 15 mSv, što je usporedivo s dozama zračenja intravenske urografije. Detaljna anamneza, klinički pregled i analiza urina ključni su za pravilan probir pacijenata i ciljani odabir CTU protokola, te su ujedno najučinkovitiji način poboljšavanja dijagnostičke točnosti i smanjivanja doze zračenja CT urografije.
We demonstrate a rare case of lingual thyroid together with squamous cell carcinoma of the base of tongue. 54-year-old patient presented with left sided lymph node enlargement in regions II, III and ...IV without any clinical symptoms. Physical examination revealed semicircular bulge at the base of tongue measuring 30 x 20 mm and tumorous lesion was suspected. Neck ultrasound showed pathological enlargement of lymph nodes and FNA of lymph node revealed squamous carcinoma cells in the smear. Further investigation included CT and MRI of the neck depicted ectopic thyroid tissue in base of tongue and enlarged and necrotic lymph nodes in regions II and III. Primary carcinoma could not be depicted. Biopsy of the lingual mass was performed and histology confirmed ectopic thyroid tissue. Physical examination of the oral cavity was repeated and suspicious area on the left side of the tongue base near ectopic thyroidal tissue was identified. Histology after biopsy confirmed squamous cell carcinoma with superficial growth. This case emphasizes the important role that collaboration of radiologist and otorhinolaryngologyst has in correctly diagnosing oropharyngeal pathology. Also, we underline the importance of careful oropharyngeal region screening in case of unknown pathologic lymphadenopathy, when the possibility of oropharyngeal cancer has to be considered.
Hepatocellular carcinoma (HCC) occurs mostly in people with chronic liver disease and ranks sixth in terms of global instances of cancer, and fourth in terms of cancer deaths for men. Despite that ...abdominal ultrasound (US) is used as an initial test to exclude the presence of focal liver lesions and serum alpha-foetoprotein (AFP) measurement may raise suspicion of HCC occurrence, further testing to confirm diagnosis as well as staging of HCC is required. Current guidelines recommend surveillance programme using US, with or without AFP, to detect HCC in high-risk populations despite the lack of clear benefits on overall survival. Assessing the diagnostic accuracy of US and AFP may clarify whether the absence of benefit in surveillance programmes could be related to under-diagnosis. Therefore, assessment of the accuracy of these two tests for diagnosing HCC in people with chronic liver disease, not included in surveillance programmes, is needed.
Primary: the diagnostic accuracy of US and AFP, alone or in combination, for the diagnosis of HCC of any size and at any stage in adults with chronic liver disease, either in a surveillance programme or in a clinical setting. Secondary: to assess the diagnostic accuracy of abdominal US and AFP, alone or in combination, for the diagnosis of resectable HCC; to compare the diagnostic accuracy of the individual tests versus the combination of both tests; to investigate sources of heterogeneity in the results.
We searched the Cochrane Hepato-Biliary Group Controlled Trials Register, the Cochrane Hepato-Biliary Group Diagnostic-Test-Accuracy Studies Register, Cochrane Library, MEDLINE, Embase, LILACS, Science Citation Index Expanded, until 5 June 2020. We applied no language or document-type restrictions.
Studies assessing the diagnostic accuracy of US and AFP, independently or in combination, for the diagnosis of HCC in adults with chronic liver disease, with cross-sectional and case-control designs, using one of the acceptable reference standards, such as pathology of the explanted liver, histology of resected or biopsied focal liver lesion, or typical characteristics on computed tomography, or magnetic resonance imaging, all with a six-months follow-up.
We independently screened studies, extracted data, and assessed the risk of bias and applicability concerns, using the QUADAS-2 checklist. We presented the results of sensitivity and specificity, using paired forest-plots, and tabulated the results. We used a hierarchical meta-analysis model where appropriate. We presented uncertainty of the accuracy estimates using 95% confidence intervals (CIs). We double-checked all data extractions and analyses.
We included 373 studies. The index-test was AFP (326 studies, 144,570 participants); US (39 studies, 18,792 participants); and a combination of AFP and US (eight studies, 5454 participants). We judged at high-risk of bias all but one study. Most studies used different reference standards, often inappropriate to exclude the presence of the target condition, and the time-interval between the index test and the reference standard was rarely defined. Most studies with AFP had a case-control design. We also had major concerns for the applicability due to the characteristics of the participants. As the primary studies with AFP used different cut-offs, we performed a meta-analysis using the hierarchical-summary-receiver-operating-characteristic model, then we carried out two meta-analyses including only studies reporting the most used cut-offs: around 20 ng/mL or 200 ng/mL. AFP cut-off 20 ng/mL: for HCC (147 studies) sensitivity 60% (95% CI 58% to 62%), specificity 84% (95% CI 82% to 86%); for resectable HCC (six studies) sensitivity 65% (95% CI 62% to 68%), specificity 80% (95% CI 59% to 91%). AFP cut-off 200 ng/mL: for HCC (56 studies) sensitivity 36% (95% CI 31% to 41%), specificity 99% (95% CI 98% to 99%); for resectable HCC (two studies) one with sensitivity 4% (95% CI 0% to 19%), specificity 100% (95% CI 96% to 100%), and one with sensitivity 8% (95% CI 3% to 18%), specificity 100% (95% CI 97% to 100%). US: for HCC (39 studies) sensitivity 72% (95% CI 63% to 79%), specificity 94% (95% CI 91% to 96%); for resectable HCC (seven studies) sensitivity 53% (95% CI 38% to 67%), specificity 96% (95% CI 94% to 97%). Combination of AFP (cut-off of 20 ng/mL) and US: for HCC (six studies) sensitivity 96% (95% CI 88% to 98%), specificity 85% (95% CI 73% to 93%); for resectable HCC (two studies) one with sensitivity 89% (95% CI 73% to 97%), specificity of 83% (95% CI 76% to 88%), and one with sensitivity 79% (95% CI 54% to 94%), specificity 87% (95% CI 79% to 94%). The observed heterogeneity in the results remains mostly unexplained, and only in part referable to different cut-offs or settings (surveillance programme compared to clinical series). The sensitivity analyses, excluding studies published as abstracts, or with case-control design, showed no variation in the results. We compared the accuracy obtained from studies with AFP (cut-off around 20 ng/mL) and US: a direct comparison in 11 studies (6674 participants) showed a higher sensitivity of US (81%, 95% CI 66% to 90%) versus AFP (64%, 95% CI 56% to 71%) with similar specificity: US 92% (95% CI 83% to 97%) versus AFP 89% (95% CI 79% to 94%). A direct comparison of six studies (5044 participants) showed a higher sensitivity (96%, 95% CI 88% to 98%) of the combination of AFP and US versus US (76%, 95% CI 56% to 89%) with similar specificity: AFP and US 85% (95% CI 73% to 92%) versus US 93% (95% CI 80% to 98%).
In the clinical pathway for the diagnosis of HCC in adults, AFP and US, singularly or in combination, have the role of triage-tests. We found that using AFP, with 20 ng/mL as a cut-off, about 40% of HCC occurrences would be missed, and with US alone, more than a quarter. The combination of the two tests showed the highest sensitivity and less than 5% of HCC occurrences would be missed with about 15% of false-positive results. The uncertainty resulting from the poor study quality and the heterogeneity of included studies limit our ability to confidently draw conclusions based on our results.
Hepatocellular carcinoma occurs mostly in people with chronic liver disease and ranks sixth in terms of global incidence of cancer, and fourth in terms of cancer deaths. In clinical practice, ...computed tomography (CT) is used as a second-line diagnostic imaging modality to confirm the presence of focal liver lesions suspected as hepatocellular carcinoma on prior diagnostic test such as abdominal ultrasound or alpha-foetoprotein, or both, either in surveillance programmes or in clinical settings. According to current guidelines, a single contrast-enhanced imaging study CT or magnetic resonance imaging (MRI) showing typical hallmarks of hepatocellular carcinoma in people with cirrhosis is valid to diagnose hepatocellular carcinoma. However, a significant number of hepatocellular carcinomas do not show typical hallmarks on imaging modalities, and hepatocellular carcinoma is, therefore, missed. There is no clear evidence of the benefit of surveillance programmes in terms of overall survival: the conflicting results can be a consequence of inaccurate detection, ineffective treatment, or both. Assessing the diagnostic accuracy of CT may clarify whether the absence of benefit could be related to underdiagnosis. Furthermore, an assessment of the accuracy of CT in people with chronic liver disease, who are not included in surveillance programmes is needed for either ruling out or diagnosing hepatocellular carcinoma.
Primary: to assess the diagnostic accuracy of multidetector, multiphasic contrast-enhanced CT for the diagnosis of hepatocellular carcinoma of any size and at any stage in adults with chronic liver disease, either in a surveillance programme or in a clinical setting. Secondary: to assess the diagnostic accuracy of CT for the diagnosis of resectable hepatocellular carcinoma in adults with chronic liver disease.
We searched the Cochrane Hepato-Biliary Trials Register, Cochrane Hepato-Biliary Diagnostic-Test-Accuracy Studies Register, the Cochrane Library, MEDLINE, Embase, LILACS, Science Citation Index Expanded, and Conference Proceedings Citation Index - Science until 4 May 2021. We applied no language or document-type restrictions.
Studies assessing the diagnostic accuracy of CT for the diagnosis of hepatocellular carcinoma in adults with chronic liver disease, with cross-sectional designs, using one of the acceptable reference standards, such as pathology of the explanted liver and histology of resected or biopsied focal liver lesion with at least a six-month follow-up.
At least two review authors independently screened studies, extracted data, and assessed the risk of bias and applicability concerns, using the QUADAS-2 checklist. We presented the results of sensitivity and specificity, using paired forest plots, and tabulated the results. We used a hierarchical meta-analysis model where appropriate. We presented uncertainty of the accuracy estimates using 95% confidence intervals (CIs). We double-checked all data extractions and analyses.
We included 21 studies, with a total of 3101 participants. We judged all studies to be at high risk of bias in at least one domain because most studies used different reference standards, often inappropriate to exclude the presence of the target condition, and the time-interval between the index test and the reference standard was rarely defined. Regarding applicability in the patient selection domain, we judged 14% (3/21) of studies to be at low concern and 86% (18/21) of studies to be at high concern owing to characteristics of the participants who were on waiting lists for orthotopic liver transplantation. CT for hepatocellular carcinoma of any size and stage: sensitivity 77.5% (95% CI 70.9% to 82.9%) and specificity 91.3% (95% CI 86.5% to 94.5%) (21 studies, 3101 participants; low-certainty evidence). CT for resectable hepatocellular carcinoma: sensitivity 71.4% (95% CI 60.3% to 80.4%) and specificity 92.0% (95% CI 86.3% to 95.5%) (10 studies, 1854 participants; low-certainty evidence). In the three studies at low concern for applicability (861 participants), we found sensitivity 76.9% (95% CI 50.8% to 91.5%) and specificity 89.2% (95% CI 57.0% to 98.1%). The observed heterogeneity in the results remains mostly unexplained. The sensitivity analyses, which included only studies with clearly prespecified positivity criteria and only studies in which the reference standard results were interpreted without knowledge of the results of the index test, showed no variation in the results.
In the clinical pathway for the diagnosis of hepatocellular carcinoma in adults with chronic liver disease, CT has roles as a confirmatory test for hepatocellular carcinoma lesions, and for staging assessment. We found that using CT in detecting hepatocellular carcinoma of any size and stage, 22.5% of people with hepatocellular carcinoma would be missed, and 8.7% of people without hepatocellular carcinoma would be unnecessarily treated. For resectable hepatocellular carcinoma, we found that 28.6% of people with resectable hepatocellular carcinoma would improperly not be resected, while 8% of people without hepatocellular carcinoma would undergo inappropriate surgery. The uncertainty resulting from the high risk of bias in the included studies and concerns regarding their applicability limit our ability to confidently draw conclusions based on our results.
Although anatomical properties and vessel variations of the celiac trunk are well explored in the literature, there is not so much information on the arterial diameters, and this data is important ...for surgical procedures and angiographic examinations. The aim of this study was to investigate properties of the celiac trunk in humans by using anatomical dissection. Ninety cadavers were dissected for the celiac trunk identification and arterial diameter measurements. The results of anatomical examination showed that in 72% of all cases the celiac trunk divides into the splenic artery and the common hepatic artery, while the left gastric artery arises as a first branch and had origin between aorta, all over the celiac trunk up to a bifurcation. From the 90 cadavers, 4 presented anatomical variations. Where normal anatomy was present, the mean length of the celiac trunk was 1.9 +/- 0.08 cm and its mean arterial diameter was 0.78 +/- 0.08 cm. The splenic artery had the largest diameter (0.61 +/- 0.05 cm) and the left gastric artery had the smallest diameter (0.38 +/- 0.03 cm). Our data represent original results about anatomical variations and arterial diameter of the celiac trunk and its main branches provided by anatomical dissection.
Rak testisa najčešći je solidni tumor u muškaraca u dobi od 15. do 34. godine. Incidencija raka testisa u svijetu udvostručena je u posljednjih 40 godina. Tumori zametnih stanica čine 95% svih tumora ...testisa, a podijeljeni su u dva osnovna histološka tipa: seminomi i neseminomi. Osobito značenje daje im velik postotak izlječivosti i u diseminiranoj fazi bolesti. Tom je uspjehu najviše pridonijela kemoterapija, ali kirurgija je i dalje neizostavan dio uspješnog liječenja. U znatnog dijela bolesnika danas se nastoji odrediti terapijski minimum kojim se izbjegava niz nuspojava, a dovodi do jednakog uspjeha kao i donedavno agresivniji terapijski pristup. U tekstu koji slijedi iznesene su kliničke upute radi standardizacije dijagnostike, liječenja i praćenja bolesnika s tumorima
zametnih stanica testisa u Republici Hrvatskoj.
Spinalni epiduralni prostor smješten je između dure mater i vertebralne kolumne i proteže se od foramen magnuma do nivoa S2/S3 spinalnog kanala. Podijeljen je u prednji i stražnji odjeljak. Zbog ...izvrsnog razlučivanja mekih tkiva, magnetska rezonancija metoda je izbora za otkrivanje i karakterizaciju patoloških promjena spinalnog epiduralnog prostora koje su etiološki različitog podrijetla. Mnoge lezije proizlaze iz samog epiduralnog prostora ili se šire iz okolnih struktura, a ovaj je prostor često sijelo metastatskih depozita. Zbog mogućnosti širenja patoloških procesa prema korijenima spinalnih živaca ili leđnoj moždini, lezije epiduralnog prostora mogu se prezentirati simptomima radikulopatije ili mijelopatije.
Od ranije je poznato kako učestalost ekspanzivnih lezija nadbubrežnih žlijezda na obdukcijama značajno nadilazi broj klinički potvrđenih adrenalnih lezija. Zbog sve učestalijeg korištenja slojevnih ...tehnika snimanja posljednjih godina otkriva se značajno veći broj suprarenalnih tvorbi koje zahtijevaju karakterizaciju i endokrinološku obradu. Većina tih lezija su nefunkcionalni (silentni) adenomi, tzv. incidentalomi, no potrebna je slikovna karakterizacija lezija kako bi se isključio maligni tumor i odredili daljnji terapijski postupci. U radu prikazujemo pregled literature o slikovnoj dijagnostici najčešćih benignih i malignih lezija nadbubrežnih žlijezda, s fokusom na kompjutoriziranu tomografiju i magnetsku rezonanciju s prikazom primjera iz vlastite kliničke prakse. U nastavku prikazujemo algoritam temeljen na preporukama ACR-a (American College of Radiology) i algoritmu koji je sastavio Incidental Findings Committee o optimalnom odabiru slikovne metode i daljnjim postupcima s novootkrivenim lezijama nadbubrežnih žlijezda.
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