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Z Gastroenterol 2012; 50(5): 457-467
DOI: 10.1055/s-0031-1282076
Übersicht
© Georg Thieme Verlag KG Stuttgart · New York

Imaging of Gastrointestinal Stromal Tumours with Modern Ultrasound Techniques − A Pictorial Essay

Gastrointestinale Stromatumoren – Pictorial Essay
C. F. Dietrich
1   Medical Clinic 2, Caritas-Krankenhaus, Bad Mergentheim, Germany
,
C. Jenssen
2   Medical Clinic, Klinikum Märkisch Oderland, Wriezen, Germany
,
M. Hocke
3   Medical Clinic 2, Klinikum Meiningen, Meiningen, Germany
,
X.-W. Cui
1   Medical Clinic 2, Caritas-Krankenhaus, Bad Mergentheim, Germany
,
M. Woenckhaus
4   Department of Pathology, Caritas-Krankenhaus, Bad Mergentheim, Germany
,
A. Ignee
1   Medical Clinic 2, Caritas-Krankenhaus, Bad Mergentheim, Germany
› Author Affiliations
Further Information

Publication History

05 October 2011

02 December 2011

Publication Date:
11 May 2012 (online)

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Abstract

Gastrointestinal stromal tumours (GIST) are rare tumours of the gastrointestinal tract. Dealing with these tumours requires a profound knowledge of the nature of the lesions and their malignant potentials. Modern ultrasound techniques provide the necessary tools to give the clinician the information he needs to diagnose and treat the patient. This article reviews the actual pathophysiological knowledge of GIST and provides a broad spectrum of ultrasound findings to introduce the reader into modern ultrasound investigation methods of subepithelial tumours. It covers the transcutaneous as well as the endoscopic ultrasound approach. Different conditions of GIST like the low risk or high risk form as well as the metastatic form will be discussed in diagnosis and treatment with plenty of examples. Special attention is paid to contrast-enhanced ultrasound techniques and elastography from the transcutaneous as well as the endoscopic route. Other diagnostic methods like CT, MRI and PET CT are additionally reviewed and their role in clinical practice is compared with that of ultrasound. The aim of the article is to introduce the reader into the new ultrasound techniques and special diagnostic behaviour of GIST and outline clinical pathways to deal correctly with different stages of the disease.

Zusammenfassung

Gastrointestinale Stromatumoren (GIST) sind relativ seltene Tumoren des Gastrointestinaltrakts. Aufgrund des Vaskularisationsmusters von GIST kommt es häufig spontan, aber auch unter Therapie zu Einblutungen, die diagnostisch wegweisend sind und mittels kontrastverstärkter transkutaner Sonografie und kontrastverstärkter endoskopischer Ultraschalltechniken erkannt werden können. Die kontrastverstärkte Sonografie mit intravaskulärem Kontrastmittel (Sonovue®) ist zur Beurteilung der Vaskularität und Neoangiogenese das einzige sichere bildgebende Verfahren, da sich Kontrastmittel bei der Computertomografie und Magnetresonanztomografie nicht streng intravaskulär verteilen, sondern sich per Diffusion in die Umgebung ausbreiten. Für die Verlaufsbeurteilung von GIST hat sich im praktischen Alltag die kontrastverstärkte Sonografie somit als besonders hilfreich erwiesen. Der Artikel beschreibt bildgebende Besonderheiten von GIST auch anhand von Bildbeispielen.

Key words

leiomyoma - subepithelial tumours - guidelines

Schlüsselwörter

Leiomyom - subepitheliale Tumoren - Richtlinien
 

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