This 54 year old lady presented with a one year history of a soft tissue lump over the ulna aspect of the right hand. She reported that the lump had been getting slightly bigger over the last few weeks and it was not painful.
A diagnostic MSK ultrasound scan of her right hand in the clinic today showed an ill-defined mixed echogenic inhomogeneous soft tissue mass noted over the hypo thenar eminence of the right hand extending to the ulna border. The soft tissue mass measured 3.2 x 1.5cm in diameter. There is no vascularity noted on power doppler. Appearances are consistent with a benign soft tissue lesion highly suggestive of intramuscular lipoma.
The patient was subsequently referred for an MRI for further clarification, the results of which were 'A soft tissue lesion of 2.8 cm by 1.5 cm x 1.5 cm with well-defined, smooth outline borders and isointense signal to fat in all sequences in keeping with intramuscular lipoma of the hypothenar muscles'.
Patient is awaiting surgical removal of the lipoma.
For those who are interested in reading more on intramuscular lipoma's the following texts provide further information.
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