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DOI: 10.1055/s-2008-1077080
© Georg Thieme Verlag KG Stuttgart · New York
Lumbar Spinal Osteoblastoma Mimicking a Dumbbell Radicular Schwannoma
Lumbales spinales Osteoblastom, das ein radikuläres Sanduhr-Schwannom nachahmtPublication History
Publication Date:
29 July 2008 (online)
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Abstract
Spinal dumbbell tumors originate from nerve roots, usually growing within the spinal canal, the neural foramen and the extraforaminal compartment in the paraspinal region. We report a case of a 20-year-old man who presented with back pain radiating to his left lower limb mostly when in a supine position. Magnetic resonance imaging of the lumbar spine showed a dumbbell lesion at the L5-S1 neural foramen, with enlargement of the foramen and extension into the left paraspinal compartment. Although MR imaging studies were strongly suggestive of a dumbbell radicular schwannoma, the histological diagnosis was an osteoblastoma of the lumbar spine originating from the left L5 pedicle with intracanalicular, intraforaminal and extracanalicular extension. The presentation, imaging studies, intervention, pathology and differential diagnosis are described.
Zusammenfassung
Spinale Sanduhr-Tumoren haben ihren Ursprung in Nervenwurzeln, wachsen gewöhnlich innerhalb des Spinalkanals, den Neuroforamina und im extraforaminalen Kompartiment in der paraspinalen Region. Wir berichten über den Fall eines 20-jährigen Mannes, der sich mit lumbalen Schmerzen vorstellte, die vor allem in Rückenlage in die linke untere Extremität ausstrahlten. Ein MRI der LWS zeigte eine sanduhrförmige Läsion im Neuroforamen L5/S1 mit einer Vergrösserung des Foramens und Ausdehnung in das linke paraspinale Kompartiment. Anhand der kernspintomographischen Aufnahmen wurde der hochgradige Verdacht auf ein radikuläres Sanduhr-Schwannom gestellt. In der histologischen Untersuchung wurde jedoch ein lumbales Osteoblastom nachgewiesen, welches vom linken L5-Pedikel ausging und sich intrakanalikulär, intraforaminal und extrakanalikulär ausbreitete. Es werden Klinik, Bildgebung, Intervention, Pathologie und Differentialdiagnosen beschrieben.
Key words
spinal osteoblastoma - radicular schwannoma - dumbbell schwannoma
Schlüsselwörter
lumbal-spinales Osteoblastom - radikuläres Schwannom - Sanduhr-Schwannom
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Correspondence
Dr. R. GazzeriMD
Department of Neurosurgery
San Giovanni – Addolorata Hospital
via amba aradam 9
00184 Rome
Italy
Phone: +39/067/705 53 56
Fax: +39/067/705 53 56
Email: robertogazzeri@gmail.com