Zusammenfassung
Ziel: Inwieweit können Tumoren des Kolon und des Rektum im Vergleich zur Endoskopie auch
sonografisch erfasst werden. Material und Methoden: In einem Zeitraum von zweieinhalb Jahren wurden alle sonografisch sichtbaren Kolontumoren
aufgezeichnet und dann mit den Ergebnissen der Koloskopie aus demselben Zeitraum verglichen.
Die Sonografie wurde in allen Fällen ohne spezielle Vorbereitung vor der Koloskopie
durchgeführt. Ergebnisse: Die Studie umfasst insgesamt 521 Neoplasmen bei 417 Patienten. Die Tumoren unterteilen
sich in 181 Karzinome, 122 Polypen ≥ 1 cm, 207 Polypen < 1 cm und 11 andere Tumoren.
Sonografisch wurden 62 % (112/181) der Karzinome erfasst, 30 % in Tumorstadien pTis
bis pT2, 82 % im Stadium pT3 und pT4. Die Detektionsrate betrug bei den Polypen ≥
1 cm 20 %, bei den Polypen < 1 cm 2 %. Die Mehrzahl der nicht erkannten größeren Tumoren
(15/18) war im Rektum und unteren Sigma lokalisiert. Schlussfolgerung: Kolontumoren im T3- und T4-Stadium können sonografisch in einem hohen Prozentsatz
erfasst werden. Schwachstellen der Sonografie sind insbesondere Polypen und kleine
Tumoren und bei größeren Tumoren jene am Rektum und unteren Sigma.
Abstract
Purpose: Sonographic detection rate of colorectal tumours in comparison with endoscopy. Materials and Methods: Within a period of 32 months all sonographically detected colorectal tumours were
registered and the results compared with endoscopic findings within the same period.
The patients had no peroral preparation for the sonographic examination which was
always performed before coloscopy. Results: The study encloses 521 tumours in 417 patients. The tumours can be subdivided into
181 cancers, 122 polyps ≥ 1 cm, 207 polyps < 1 cm and 11 other tumours. 62 % (112/181)
of cancers could be detected by sonography, 30 % of stage pTis, pT1 or pT2, 82 % of
stage pT3 or pT4. The detection rate was 20 % for polyps ≥ 1 cm, but only 2 % for
polyps < 1 cm. The majority of larger tumours not detected on sonography (15/18) was
located in the rectum and lower sigmoid colon. Conclusion: Colorectal cancers of stage T3 and T4 can be detected sonographically in a high percentage
of cases. Sonography provides insufficient results in detecting polyps and small cancers,
and even larger tumours may be missed especially in the lower sigmoid colon and rectum.
Key words
neoplasms - rectum - ultrasound - colon
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Dr. Peter Macheiner
Radiologie und Nuklearmedizin, KH Barmherzige Brüder
Kajetanerplatz 1
5020 Salzburg
Telefon: ++43/6 62/8 08 85 11
Fax: ++43/6 62/8 08 85 26
eMail: peter.macheiner@bbsalz.at