Diagnostic imaging of lipoma arborescens.
OBJECTIVE
The imaging characteristics of lipoma arborescens using plain radiographs, computed tomography (CT), and magnetic resonance imaging (MRI) are described.


METHODS
Five patients with a diagnosis of lipoma arborescens are presented. Three had monoarticular involvement of the knee joint. In the remaining two patients both knees and both hips, respectively, were affected. All patients were examined using plain radiographs and MRI. CT was employed in two cases.


CONCLUSIONS
A conclusive diagnosis with exclusion of other synovial pathologies having similar clinical and radiological behavior can be achieved on the basis of the MRI characteristics of lipoma arborescens. The aetiology of lipoma arborescens remains unknown, but its association with previous pathology of the affected joints in all our patients supports the theory of a non-neoplastic reactive process involving the synovial membrane.
Servicio de Radiodiagnóstico, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
S
S
Martín
L
L
Hernández
J
J
Romero
J
J
Lafuente
A I
AI
Poza
P
P
Ruiz
M
M
Jimeno
D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006621:Hip Joint / Q000473:pathology*; D006801:Humans; D007719:Knee Joint / Q000473:pathology*; D008067:Lipoma / Q000175:diagnosis* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000175:diagnosis / Q000473:pathology; D012680:Sensitivity and Specificity; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000473:pathology; D013583:Synovial Membrane / Q000473:pathology*; D014057:Tomography, X-Ray Computed