Title Dijagnostička točnost različitih metoda u dijagnostici hepatocellularnog karcinoma
Title (english) Diagnostic accuracy of different methods in diagnosis of hepatocellular carcinoma
Author Tin Nadarević
Mentor Davor Štimac (mentor)
Mentor Damir Miletić (komentor)
Committee member Lidija Bilić-Zulle (predsjednik povjerenstva)
Committee member Livia Puljak (član povjerenstva)
Committee member Goran Poropat (član povjerenstva)
Granter University of Rijeka Faculty of Medicine (Department of Internal Medicine) Rijeka
Defense date and country 2022, Croatia
Scientific / art field, discipline and subdiscipline BIOMEDICINE AND HEALTHCARE Clinical Medical Sciences Internal Medicine
Scientific / art field, discipline and subdiscipline BIOMEDICINE AND HEALTHCARE Clinical Medical Sciences Radiology
Universal decimal classification (UDC ) 61 - Medical sciences
Thesaurus (MESH - Medical Subject Headings )
Liver Neoplasms
diagnosis
Carcinoma, Hepatocellular
diagnosis
Diagnostic Imaging
Diagnostic Tests, Routine
alpha-Fetoproteins
Evidence-Based Medicine
Abstract Ciljevi istraživanja: odrediti dijagnostičku točnost alfa-fetoproteina (AFP), ultrazvuka (US),
njihove kombinacije, kontrastnog ultrazvuka (CEUS), kompjutorizirane tomografije (CT) i
magnetske rezonancije (MR) u dijagnostici i procjeni resektabilnosti hepatocelularnog
karcinoma (HCC) u osoba s kroničnom bolesti jetre koristeći Cochrane sustavne pregledne
radove i meta-analize. Dodatni cilj rada je osmisliti dijagnostički algoritam obrade osoba sa
sumnjom na postojanje hepatocelularnog karcinoma temeljen na dokazima.
Ispitanici i metode: uključeni su ispitanici iz primarnih studija dijagnostičke točnosti svakog
dijagnostičkog postupka koje su dobivene temeljitom analizom rezultata sustavne pretrage
relevantnih bibliografskih baza. Traženi su podatci o stvarno pozitivnim, lažno pozitivnim,
lažno negativnim i stvarno negativnim rezultatima za svaki dijagnostički postupak. Koristeći
prikladne meta-analitičke modele izračunate su vrijednosti skupne osjetljivosti i specifičnosti
te post-testnih vjerojatnosti za pozitivan i negativan test, a rezultati su prikazani u obliku forest
plotova, ROC grafova (prema engl. receiver operating characteristics) i krivulja post-testnih
vjerojatnosti. Učinjene su i usporedbe dijagnostičkih postupaka u dvije razine dijagnostičke
obrade: trijažni testovi i dodatni testovi.
Rezultati: sustavnim pretraživanjem literature pronađeno je ukupno 141 651 znanstvenih
radova. Nakon isključivanja duplikata i radova temeljem naslova i sažetaka, analiziran je
cjeloviti tekst 929 radova, a u konačne analize uključena je 451 primarna studija. Među
trijažnim testovima najveću dijagnostičku točnost ima kombinacija AFP-a s graničnom
vrijednosti 20 ng/mL i US-a uz najveću post-testnu vjerojatnost za negativan test od 1 % (95
% CI 0,4 % do 2,5 %). U skupini dodatnih testova najveće post-testne vjerojatnosti za pozitivan
test imaju CEUS 96,6 % (95 % CI 94,1 % do 98 %) i MR 94,5 % (95 % CI 91,5 % do 96,5 %).
U svrhu procjene resektabilnosti HCC-a, najveću dijagnostičku točnost ima MR uz osjetljivost
84,3 % (95 % CI 77,6 % do 89,3 %) i specifičnost 92,9 % (95 % CI 88,3 % do 95,9 %).
Temeljem rezultata svih postupaka osmišljen je dijagnostički algoritam.
Zaključci: svi trijažni testovi imaju veliku točnost u isključivanju HCC-a, a najbolji
dijagnostički postupak je kombinacija AFP-a s graničnom vrijednosti 20 ng/mL i US-a.
Najbolji dijagnostički postupci za potvrđivanje HCC-a su CEUS i MR, a za procjenu
resektabilnosti HCC-a MR. CT ima najslabiju točnost u potvrđivanju bolesti pa se preporučuje
kao metoda izbora za stupnjevanje bolesti.
Abstract (english) Objectives: to determine the diagnostic accuracy of alpha-fetoprotein (AFP), ultrasound (US),
their combination, contrast ultrasound (CEUS), computed tomography (CT) and magnetic
resonance imaging (MRI) in the diagnosis and assessment of hepatocellular carcinoma (HCC)
resectability in people with chronic liver disease using Cochrane systematic reviews and metaanalyzes. An additional objective is to create an evidence-based diagnostic algorithm for
assessment of people with suspected hepatocellular carcinoma.
Patients and methods: we included patients from primary diagnostic accuracy studies which
were obtained through a systematic search of relevant scientific databases. From each included
primary study, data on true positive, false positive, false negative and true negative results for
each diagnostic procedure was obtained. Using appropriate meta-analytical models, the values
of pooled sensitivity, pooled specificity and post-test probabilities for positive and negative
tests were calculated. Results are presented with forest plots, ROC graphs (receiver operating
characteristics) and post-test probability curves. Comparisons of diagnostic procedures was
also performed in two levels of diagnostic work-up: triage tests and additional tests.
Results: systematic literature search yielded a total of 141,651 records. After excluding
duplicates and records based on titles and abstracts, 929 full-texts were analyzed, and in total
451 primary studies were included in the final analyzes. Among the triage tests, the
combination of AFP with a cut-off value of 20 ng/mL and US has the highest diagnostic
accuracy and post-test probability for a negative test result of 1 % (95 % CI 0.4 % to 2.5 %).
Among additional tests, the highest post-test probabilities for a positive test result are found in
CEUS 96.6 % (95 % CI 94.1 % to 98 %) and MR 94.5 % (95 % CI 91.5 % to 96,5 %),
respectively. For the purpose of assessing HCC resectability, MR has the best diagnostic
accuracy with a sensitivity of 84.3 % (95 % CI 77.6 % to 89.3 %) and a specificity of 92.9 %
(95 % CI 88.3 % to 95,9 %), respectively. A diagnostic algorithm was designed based on all
results.
Conclusions: all triage tests have high accuracy in excluding HCC, and the optimal diagnostic
procedure is a combination of AFP with a cut-off value of 20 ng/mL and US. CEUS and MR
are optimal diagnostic procedures for confirming HCC, while MR is optimal for assessing HCC
resectability. Among additional tests, CT has the lowest accuracy in disease confirmation and
is therefore recommended as the modality of choice for disease staging.
Keywords
dijagnostički postupci
karcinom hepatocelularni
medicina temeljena na dokazima
meta-analiza
probavni sustav
slikovne metode
dijagnostičke
točnost podataka
Keywords (english)
Data Accuracy
Diagnostic Tests
Digestive System
Carcinoma Hepatocellular
Imaging Diagnostic
Medicine Evidence Based
Meta-Analysis
Language croatian
URN:NBN urn:nbn:hr:184:729144
Promotion 2022
Study programme Title: Biomedicine Postgraduate (doctoral) study programme Study programme type: university Study level: postgraduate Academic / professional title: doktor/doktorica znanosti, područje biomedicine i zdravstvo (doktor/doktorica znanosti, područje biomedicine i zdravstvo)
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Created on 2022-10-21 08:10:25