Long-Standing Morel-Lavallée Lesions of the Trochanteric Region and Proximal Thigh: MRI Features in Five Patients

Mellado, José María Asencio; Palomar, Laura; Díaz, Laura Pérez; Ramos, A.; Saurí, A.

doi:10.2214/ajr.182.5.1821289

Cited by 126 publications

(94 citation statements)

References 10 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[1] It is also known as Morel-Lavallee seroma, post-traumatic soft tissue cyst, post-traumatic extravasation, or Morel-Lavallee effusion. [2] The MLL is a closed degloving injury of an extremity after a crush injury, resulting in the skin and subcutaneous fatty tissue abruptly separating from the underlying fascia, creating a cavity filled with bloody serous fluid. The initial injury represents a shearing of subcutaneous tissues away from the underlying fascia.…”

Section: Discussionmentioning

confidence: 99%

“…Subsequent inflammatory reaction may lead to a peripheral capsule formation, which may account for the self-perpetuation and occasional slow growth of the process. [2] The collection may then spontaneously resolve, or become persistent with encapsulation.…”

Section: Discussionmentioning

confidence: 99%

“…The fluid is of variable signal intensity depending on its makeup, and may even show a fluid-fluid level. [1][2][3]6] Initially the space between the subcutaneous fat and the underlying deep fascia is filled with blood or lymph. Later, the blood is largely resorbed and replaced by a serosanguineous fluid and becomes lined by a fibrous capsule.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Morel-Lavallee lesion: case report of a rare extensive degloving soft tissue injury

Gummalla¹,

George²,

Dutta³

2014

Ulus Travma Acil Cerrahi Derg

View full text Add to dashboard Cite

Morel-Lavallee syndrome (MLS) is a significant post-traumatic soft tissue injury in which the subcutaneous tissue is torn away from the underlying fascia (closed degloving), creating a cavity filled with hematoma and liquefied fat. It commonly occurs over the greater trochanter, but may also occur in the flank, buttocks and lumbodorsal regions. MLS is a rarely reported entity. The trauma surgeon and radiologist must be aware of this condition, as early diagnosis can lead to conservative management, while a delay can lead to surgical exploration. We report a case of extensive Morel-Lavallee lesion involving the left flank and thigh in a young adult. We discuss the magnetic resonance imaging findings and also describe the differential diagnoses and management options for MLS.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Morel-Lavallee lesion: case report of a rare extensive degloving soft tissue injury

Gummalla¹,

George²,

Dutta³

2014

Ulus Travma Acil Cerrahi Derg

View full text Add to dashboard Cite

show abstract

“…The lesion appears as a complex cystic mass with internal septations early on and evolves into an anechoic cyst compatible with liquefied hematoma [8]. MRI can characterize the internal contents as blood products or seroma, helping differentiate this lesion from a soft tissue mass [9]. Three-dimensional CT reconstructions are now routinely being used by some authors to screen for Morel-Lavallee lesions in patients sustaining traumatic pelvic and acetabular fractures [4].…”

Section: Imagingmentioning

confidence: 99%

Morel-Lavallee Lesion of the Lower Back Mimicking an Abscess: A Case Report

Montbrun¹,

Khalili²,

MacLellan³

et al. 2012

View full text Add to dashboard Cite

A closed degloving injury, or Morel-Lavallee lesion, is the result of a severe, traumatic, shearing injury, causing separation of the skin and subcutaneous tissue from the underlying deep fascia. Though well described in the orthopedic trauma literature, this lesion is not well recognized by the general surgeon in the poly-trauma setting. We present a case of a 41 year old man who was referred to the general surgery service for a "back abscess". Upon patient interview, history of a recent motor vehicle collision (MVC) was obtained, including a pelvic fracture. Imaging demonstrated a large Morel-Lavellee lesion extending from the pelvis into the lower back. Knowledge of this entity is crucial to avoid unnecessary procedures in the management of these patients.

show abstract

“…Excessive shearing force or repetitive compressive trauma causes separation of the skin and subcutaneous fat from underlying deep fascia resulting in disruption of perforating vessels and formation of fluid collections containing blood, fat, and lymph [1][2][3]. Morel-Lavallée lesions adjacent to the greater trochanter, proximal femur, buttock, and lower back are well known [4,5], and MR imaging has an established role in their diagnosis. The appearance of Morel-Lavallée effusions on MRI depends on lesion acuity and the amount of blood product, fat, and lymph tissue within it [1].…”

mentioning

confidence: 99%

Prepatellar Morel-Lavallée effusion

Yahyavi-Firouz-Abadi

Demertzis

2012

Skeletal Radiol

View full text Add to dashboard Cite

Diagnosis Prepatellar Morel-Lavalleé effusion (closed degloving injury) DiscussionLateral radiograph of the left knee shows prepatellar soft tissue swelling. MR images demonstrate a T2-hyperintense unilocular prepatellar fluid collection located between the subcutaneous fat and underlying fascia. The collection extends beyond the transverse and craniocaudal boundaries of the prepatellar bursa, with the medial and lateral margins reaching the level of the femoral epicondyles at the midcoronal plane, and the superior and inferior margins extending from the mid-thigh to beyond the tibial tubercle. These findings are indicative of a prepatellar Morel-Lavallée effusion and are distinguished from prepatellar bursitis by location beyond the anatomic confines of the prepatellar bursa. Quadriceps muscle signal intensity is normal, excluding muscle contusion as the cause of the patient's pain. Other post-traumatic subcutaneous lesions in the differential diagnosis such as fat necrosis, pseudolipoma, and coagulopathy-related hematoma are unlikely given the anatomic location, imaging characteristics, and clinical history [1]. The patient was successfully treated with activity restriction, ice, and compression wraps.Maurice Morel-Lavallée first described closed degloving injuries of the hip and pelvis in 1853 [2]. Excessive shearing force or repetitive compressive trauma causes separation of the skin and subcutaneous fat from underlying deep fascia resulting in disruption of perforating vessels and formation of fluid collections containing blood, fat, and lymph [1][2][3]. Morel-Lavallée lesions adjacent to the greater trochanter, proximal femur, buttock, and lower back are well known [4,5], and MR imaging has an established role in their diagnosis. The appearance of Morel-Lavallée effusions on MRI depends on lesion acuity and the amount of blood product, fat, and lymph tissue within it [1]. Mellado et al. described six types of Morel-Lavallée effusions ranging from seroma to infected collections, with a unilocular T2 hyperintense fluid collection being the most common finding of the basic subtypes [1]. Neither blood product, fat, nor a fibrous pseudocapsule was identified in this particular case. Of these findings, the presence of an enhancing pseudocapsule has prognostic value, suggesting possible benefit of therapeutic aspiration or debridement to facilitate resolution of the lesion [1,2].Despite the established diagnosis of Morel-Lavallée effusion in the pelvis and hips, its occurrence in the prepatellar region has only recently been described in the orthopedic [6,7] and radiology literature [8,9]. A recent case series of 24The case presentation can be found at

show abstract

Long-Standing Morel-Lavallée Lesions of the Trochanteric Region and Proximal Thigh: MRI Features in Five Patients

Cited by 126 publications

References 10 publications

Morel-Lavallee lesion: case report of a rare extensive degloving soft tissue injury

Morel-Lavallee lesion: case report of a rare extensive degloving soft tissue injury

Morel-Lavallee Lesion of the Lower Back Mimicking an Abscess: A Case Report

Prepatellar Morel-Lavallée effusion

Contact Info

Product

Resources

About