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Lipoma of the filum terminale, also known as fatty filum terminale or filar lipoma, is a relatively common finding on imaging of the lumbar spine, and in most cases is an incidental finding of no clinical concern.
Lipomas of the filum terminale (LFT) have been defined as an abnormality with fatty deposits in the filum terminale (diameter >2 mm), which is the simplest type of occult spinal dysraphism. The incidental rate of detection of the LFT on mag-netic resonance imaging (MRI) ranges 0.24–4% [1–5].
The treatment for FTL is surgical untethering by sectioning the filum terminale, which can prevent symptom progression and often results in symptom improvement. The standard surgical technique includes one level of laminotomy or laminectomy followed by dural incision and sectioning the filum.
Fibrolipomas of the filum terminale are a commonly seen lesion, and are often incidental findings on MR imaging. However, these lesions are now recognized as potential markers for cord tethering and the tight filum syndrome, even in cases in which the conus appears normally positioned.
Filum terminale lipomas are a common incidental finding on spinal MRI, and most patients present without associated symptoms. The untreated natural history is generally benign for asymptomatic patients.
Lipoma of the filum terminale (LFT) is an abnormality in which fat is deposited in the filum terminale. The lipoma is often detected by skin abnormalities in the lumbosacral area such as sacrococcygeal dimple. Some cases may develop tethered cord and become symptomatic.
A lipoma or fibrolipoma of the filum terminale is a somewhat uncommon (4-6%) and usually incidental, asymptomatic finding on MRIs of the lumbar spine.
A fibrolipoma “infiltrates” the filum and tends to be tubular. Fibrolipoma affecting the filum terminale are rare benign tumours usually discovered at imaging and rarely symptomatic, sometimes associated with radicular pain.
The filum terminale (FT) is a fibrous band that extends from the conus medullaris to the periosteum of the coccyx, and its functions are to fixate, stabilize, and buffer the distal spinal cord from normal and abnormal cephalic and caudal traction.
3 Fibrolipoma of the filum terminale (filar lipoma) The increasing use of MRI has led to the realisation that lipomatous infiltration of the filum terminale is common, found in 1.5–5% of spinal MRIs undertaken for unrelated symptoms, though they may present with symptoms of a tethered cord as late as the seventh decade.23,24 In many cases the ...