PMC5339617_01
MRI (transverse section) showing relationship of the parosteal lipoma to the underlying radius and the adjacent muscles of the forearm
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F1
It was completely separate from the adjacent forearm muscles and attached to the proximal radius (Figures 1-3).
MRI (coronal section) showing relationship of the parosteal lipoma to the underlying radius and the adjacent muscles of the forearm
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F2
It was completely separate from the adjacent forearm muscles and attached to the proximal radius (Figures 1-3).
MRI (coronal section) showing relationship of the parosteal lipoma to the underlying radius and the adjacent muscles of the forearm
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F3
It was completely separate from the adjacent forearm muscles and attached to the proximal radius (Figures 1-3).
Intraoperative photograph showing the parosteal lipoma. The overlying stretched medial and lateral branches of the PIN are clearly visible
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F4
After ensuring adequate hemostasis the wound was closed in layers (Figures 4-6). 
Intraoperative photograph showing the parosteal lipoma. The PIN branches have been carefully separated, retracted and lipoma mobilized with proximal radial attachment still in situ
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F5
After ensuring adequate hemostasis the wound was closed in layers (Figures 4-6). 
Intraoperative photograph after the parosteal lipoma has been excised and all potential sites of PIN compression have been released. The overlying stretched branches of the PIN are now lying un-stretched
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F6
After ensuring adequate hemostasis the wound was closed in layers (Figures 4-6). 
Photograph showing the excised parosteal lipoma specimen (measuring approximately 6x5x4 cm size) the peripheral fat component and the bony attachment site are visible
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F7
On gross pathology examination, the excised lump was a well circumscribed mass measuring 6x5x4 cm in size (Figure 7).