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DOI: 10.1055/s-2000-4648
Georg Thieme Verlag Stuttgart · New York
MR-Morphologie der primären aneurysmatischen Knochenzyste: Retrospektive Analyse von 38 Fällen
Publication History
Publication Date:
31 December 2000 (online)
Zusammenfassung.
Ziel: Analyse MR-tomographischer Charakteristika der primären aneurysmatischen Knochenzyste. Material und Methoden: Die MR-Untersuchungen von 38 Patienten mit histologisch gesicherter primärer aneurysmatischer Knochenzyste wurden retrospektiv bezüglich morphologischer Befunde, Signal- und Kontrastmittelanreicherungsverhalten analysiert. Ergebnisse: Die Mehrzahl der Läsionen zeigte eine scharfe Begrenzung gegenüber dem Knochen und den umgebenden Weichteilen (95 %) und war vollständig (84 %) oder partiell (16 %) von einem in allen Pulssequenzen signalarmen Randsaum umgeben. Polyzyklische Begrenzung (84 %), kortikale Expansion (87 %), zystische Hohlräume (100 %), kontrastmittelanreichernde Zystenwände (100 %), innere Septierungen (89 %), Flüssigkeitsspiegel (71 %) und divertikelartige Aussackungen der Zystenwände (68 %) stellten häufige Befunde dar. Solide Gewebekomponenten konnten mittels MRT bei allen Läsionen, welche histopathologisch größere Anteile soliden Materials enthielten (18 %), identifiziert werden. Ein Ödem der umgebenden Weichteile wurde in 29 % der Fälle beobachtet. Schlussfolgerung: Die primäre aneurysmatische Knochenzyste zeigt MR-tomographisch ein relativ einheitliches Befundmuster, welches die pathologische Anatomie dieser Knochenläsion wiedergibt.
MR morphology of primary aneurysmal bone cyst: a retrospective analysis of 38 cases.
Purpose: To define MR imaging characteristics of primary aneurysmal bone cyst. Materials and Methods: MR imaging studies of 38 patients with histologically proven primary aneurysmal bone cyst were reviewed with reference to morphological features, signal characteristics, and patterns of contrast-enhancement. Result: Most lesions were well marginated towards bone and soft tissues (95 %), either surrounded by a complete (84 %) or incomplete (16 %) rim of low signal intensity on images of all pulse sequences. Frequent features were polycyclic margins (84 %), cortical expansion (87 %), cystic spaces (100 %), contrast-enhancing cyst walls (100 %), internal septations (89 %), fluid levels (71 %) and diverticula-like projections of cyst walls (68 %). Solid tissue components could be identified by MR imaging in all lesions which, on pathological examination, contained larger portions of solid material (18 %). Edema of surrounding soft-tissues was observed in 29 % of the cases. Conclusions: Primary aneurysmal bone cysts demonstrate a relatively uniform MR imaging appearance, which reflects the patho-anatomic composition of the lesion.
Schlüsselwörter:
Aneurysmatische Knochenzyste - Knochenzysten - Tumorähnliche Knochenläsionen - Knochentumoren - MRT
Key words:
Aneurysmal bone cyst - Bones, cysts - Bone neoplasms, diagnosis - Bone neoplasms, MR - Magnetic Resonance (MR)
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Dr. med. Klaus Wörtler
Institut für Klinische Radiologie Westfälische Wilhelms-Universität Münster
Albert-Schweitzer-Straße 33
48129 Münster
Phone: + 49-251-8347302
Fax: + 49-251-8347312
Email: wortler@uni-muenster.de