Degloving Injury / Morel-Lavallée Lesion Treatment | Drainage and wound reconstruction

A Morel-Lavallée lesion is a closed degloving injury: shear forces separate skin and subcutaneous tissue from deeper fascia, creating a space that can fill with blood, lymph and fat. Compression may tamponade small lesions, as reported in posterior trunk cases, but prolonged pressure can risk pressure ulcers or reduced blood flow around the lesion. Management also depends on lesion size, infection, associated injuries and overall stability. Open degloving injuries carry infection risk and usually need surgical debridement and advanced wound care. Most doctors diagnose closed degloving injuries using MRI, which can detect these lesions. Delayed diagnosis can allow fluid and necrotic fat to accumulate and may complicate recovery.

Morel-Lavallée lesions are closed degloving injuries: blunt tangential force separates subcutaneous fat from deep fascia, disrupting local capillaries and lymphatics and creating a space where blood, lymph and necrotic fat can accumulate. Aspiration removes fluid but does not close that separated plane or remove a chronic capsule. Once a capsule forms, it can impede fluid reabsorption and make recurrence more likely after observation, compression or single-visit aspiration. Small acute collections may resolve with conservative care, while chronic, large or recurrent collections often need individualized surgical assessment. Management is tailored to lesion size, duration, symptoms, recurrence history, skin changes or infection, and imaging may help define the capsule.

Morel-Lavallée lesions are closed degloving injuries: skin and fat separate from deeper tissue, leaving a space that fills with blood, lymph and fat. Treatment may include pressure dressing, aspiration, sclerotherapy, incision and drainage, or open debridement. In the Tseng and Tornetta percutaneous technique, done within 3 days of admission, the cavity is washed and a medium closed suction drain is placed, attached to wall suction until drainage is below 30 mL in 24 hours, which may take 8 days. For a large chronic lesion, open debridement with fibrous capsule excision and two negative-pressure drainage tubes may eliminate dead space. A drain helps ongoing evacuation and debris removal; one aspiration removes fluid once.

In these injuries, tissue separation can leave a cavity that collects fluid. Sclerosing agents such as doxycycline, vancomycin, tetracycline, erythromycin, bleomycin, alcohol, or talc induce inflammation to close cavities. The aim is not simply to drain fluid once, but to make cavity walls stick together so fluid does not reaccumulate. Persistent collections may need sclerotherapy, while large or complex lesions may need surgical debridement, drainage, or reconstruction. The right choice depends on lesion size, chronicity, and associated injuries; imaging and multidisciplinary care may guide decisions. Early recognition and appropriate follow-up can reduce recurrence risk. Compression after sclerotherapy improves success, and MRI or ultrasound may help assess the lesion before pseudocapsule formation.

Morel-Lavallée lesions are closed degloving injuries where skin and subcutaneous tissue separate from fascia, leaving a fluid-filled dead space. Treatment is tailored to lesion size, severity and associated injuries, and any accompanying injuries if present; options include aspiration, compression, sclerotherapy, incision and drainage, or surgery for large or complex lesions. Sclerosing agents such as doxycycline, tetracycline, erythromycin, bleomycin, alcohol or talc induce inflammation to close cavities, and compression after sclerotherapy improves success. Sclerotherapy is one option among several, and response varies by lesion. Suitability depends on lesion size, chronicity and infection status. Chronic lesions may need debridement or reconstruction. Evidence is general and case-based, so individual suitability requires assessment.

In a Morel-Lavallée lesion, shear injury creates a space where blood and fat collect. If diagnosis or treatment is delayed, the lesion can become chronic and form a fibrous capsule. That capsule impedes fluid reabsorption and raises recurrence after observation, compression or single aspiration. For small lesions with mild symptoms and minimal capsule formation, compression and close monitoring, sometimes ultrasound-guided aspiration, may be used. For chronic lesions with prolonged duration, MRI evidence of capsule formation, large volume, recurrent fluid accumulation, functional or cosmetic impairment, or failure of conservative treatment, surgical intervention is generally preferred. The exact plan is tailored to lesion size, duration, symptom severity, recurrence history, skin necrosis or infection.

Dead space is a main reason fluid collects after injury or surgery, so eliminating it helps tissues heal without contaminated fluid. Small spaces may close by normal wound repair without tension. Larger or chronic spaces may need suturing tissue planes together, pressure dressings, packing, drains as appropriate, skin grafts, or soft-tissue flaps. For large recurrent chronic Morel-Lavallée lesions, open resection with removal of excess skin and subcutaneous tissue plus adequate negative-pressure drainage can eliminate dead space and reduce recurrence. In closed degloving, good debridement and closure over several drains may be used; small defects may heal by secondary intention or grafting.

Skin grafts need a well-vascularised bed. If the recipient site is poorly vascularised, a flap can bring its own blood supply and cover complex defects. Flaps may also restore volume or vascularity to healing structures such as bone, protect vital structures, provide robust pliable skin, and allow later reoperation through the wound when underlying structures need reconstruction, and may be preferred when robust, pliable skin is needed or reoperation through the wound is anticipated. They can obliterate dead space and maintain skin appendage function, but the trade-off is an additional donor-site wound with its own morbidity, technically demanding surgery, possible partial or total flap necrosis, and possible volume mismatch needing revision.

Open degloving injuries often require debridement, skin reattachment or grafting, and advanced wound care; all of these options usually require multiple surgeries. Closed Morel-Lavallée lesions can accumulate blood, lymph and necrotic fat, become encapsulated, infected, and resist conservative therapy. Delayed diagnosis may lead to wound breakdown, hardware compromise, chronic infection, staged debridement, negative pressure wound therapy, delayed closure, hardware removal, prolonged antibiotics, and extended wound care. In spinal trauma, soft-tissue coverage and instrumentation integrity are critical, and an evolving lesion can compound recurrent dehiscence and hardware exposure. Comorbidities and repeated tissue sampling may also guide staged debridement and flap reconstruction. The exact plan depends on severity, location, and associated injuries.