[Differential diagnosis of intraconal orbital masses using high-resolution MRI with surface coils in 78 patients].
OBJECTIVE
Over the last decade, MRI has become the standard procedure for the diagnosis of orbital masses. Purpose of the study was to evaluate criteria for differential diagnosis for intraconal masses on MRI in a large patient group.


METHODS
In a retrospective study, MR examinations of 78 patients with intraconal masses were evaluated. All examinations were performed using surface coils for high spatial resolution. Signal behavior on T2-WI and T1-WI before and after contrast application as well as further tumor characteristics (i. e., shape, size, position, delineation and infiltration) were evaluated. Every diagnosis was proven by histopathological results from extirpation (n = 18) or biopsy (n = 22), or confirmed by other imaging modalities (n = 13) or clinical course (n = 25).


RESULTS
Different tumor characteristics are helpful in the differentiation between cavernous hemangioma, lymphangioma, varices, AV malformations and solid tumors. Due to overlapping in the imaging appearance, the differentiation between inflammatory pseudotumor, lymphoma and orbital metastasis was more difficult.


CONCLUSIONS
While high resolution MRI using surface coils allows differentiation between the typical vascular tumors, the differentiation between solid tumors is more difficult. Thus, a histopathologic verification of the diagnosis is necessary in solid tumors.
Lemke
A-J
AJ
Universitätsklinikum Charité, Campus Virchow-Klinikum, Klinik für Strahlenheilkunde. lemke@charite.de
Kazi
I
I
Landeck
L M
LM
Zaspel
U
U
Hosten
N
N
Felix
R
R
D000293:Adolescent; D000328:Adult; D000368:Aged; D001165:Arteriovenous Malformations / Q000175:diagnosis / Q000473:pathology; D001706:Biopsy; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006392:Hemangioma, Cavernous / Q000175:diagnosis / Q000473:pathology; D006801:Humans; D007223:Infant; D008202:Lymphangioma / Q000175:diagnosis / Q000473:pathology; D008223:Lymphoma / Q000175:diagnosis / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009915:Orbit / Q000473:pathology; D009916:Orbital Diseases / Q000175:diagnosis / Q000473:pathology; D009918:Orbital Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary / Q000601:surgery; D016727:Orbital Pseudotumor / Q000175:diagnosis / Q000473:pathology; D012189:Retrospective Studies; D013997:Time Factors; D014648:Varicose Veins / Q000175:diagnosis / Q000473:pathology
Differenzialdiagnostik intrakonaler orbitaler Raumforderungen unter Verwendung der hochauflösenden MRT mit Oberflächenspulen anhand von 78 Patienten.