Fibromatosis - dorsolumbar region
RIGHT lower dorsal paraspinal swelling with pain - - 2 - 3 wks. Radiograph - DL spine - No bony abnormality.
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Well-defined ovoid lesion is seen in region of interest.
Size - Craniocaudal - 62 mm, Axial - 50 mm, Anteroposterior - 20 mm
Location - Deep to subcutanoeus fat , Superficial to ribs, Involves paraspinal muscle
NO adjacent rib cortex erosion.
Morphology - Hypoechoic. NO calcification. Not compressible.
Dopplar - Flow signals are noted.
Well-defined margins with vascularity were two basic findings favoring solid lesion of non-specific etiology. However, these two basic findings were ignored ( definitely by me ) and a suspicious finding of central necrosis was given more importance.
MR done a wk later, showed solid tumor ( not uploaded, no copy right ).
Surgical excision was done - operative finding of a solid lesion.
Histopathology - no necrosis. Solid lesion reported to be fibromatosis.
- Imaging of Musculoskeletal Fibromatosis. DOI: http://dx.doi.org/10.1148/radiographics.21.3.g01ma21585