Post traumatic soft tissue cyst - knee
Anterior knee trauma - 2 mths back. C/o non painful swelling - anterior knee.
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The swelling is a well-defined thin wall predominently anechoic cyst in subcutaneous plane of suprapatellar knee region.
There are few thin internal septa and a fat globule within lesion.
Lesion wall / septa do not show vascularity.
Approximate size - 36 x 32 x 13 mm
No supra-patellar knee effusion is noted.
Findings favour post traumatic soft tissue cyst in subcutaneous plane of anterior knee.
If morphologically similar lesion is noted in greater trochanteric region along with trauma history; it is called as Morel Lavallée lesion.