Morel-Lavallée lesion of the thigh: characteristic findings on US
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KeywordsFoam Doxycycline Fluid Collection Left Thigh Deep Fascia
The Morel-Lavallée lesion is an internal degloving type of injury with separation of the hypodermis from the underlying deep fascia. This results in disruption of the vascular and lymphatic plexus and a cavity is created, filling with blood, lymph, liquefied fat and necrotic debris . US demonstrates a collection in the subcutaneous region with hyperechoic nodules corresponding to remnants of fat. If there is history of shear injury to the soft tissue with chronic recurrent fluid collection and imaging features of subcutaneous collection with fat lobules along the wall, the diagnosis of Morel-Lavallée lesion should be suspected. Treatment options include serial aspiration and, if unsuccessful, sclerodesis. Early identification is important, as delay can increase incidence of infection-related morbidity.