Post traumatic soft-tissue cyst - in prepatella region
Single episode of Trauma to prepatellar region - 6 wks. C/o local swelling. Referred for ultrasound of local swelling.
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A predominently anechoic collection with well-defined thin wall is noted in prepatellar soft tissue.
Few avascular thin septa and a nodule ( probably fat globule ) are noted.
Patellar and quadriceps tendon are normal.
Patellar cortex is intact.
No supra or infrapatellar knee effusion.
If a morphologically similar lesion presents with similar clinical history but located over greater trochanter of femur, it is then called a Morel Lavallée lesion.