Encapsulated fat necrosis: a case of ‘thigh mouse’

Azad, S.; Cherian, Anil; Raine, Cameron; Barrett, Paul; Berry, Richard B.

doi:10.1054/bjps.2001.3657

Cited by 14 publications

(23 citation statements)

References 8 publications

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“…It may be caused by multiple local or systemic events, which lead to the disturbance of blood supply in the subcutaneous tissue. These conditions are usually noted in the subcutis;6 however, the tumour in the present case was located in the deep layer, and its pathogenesis was suspected to differ from the pathogenesis of these conditions.…”

Section: Discussioncontrasting

confidence: 53%

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Necrotic lipoma at the posterior thigh mimicking liposarcoma

et al. 2016

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SUMMARYA lipoma is one of the most common benign tumours and can develop at any location in the body. Lipomas present characteristic imaging features; hence, they are easy to identify on CT and MRI. However, cases of necrotic lipoma are rarely encountered; therefore, information on the imaging findings of necrotic lipomas is scarce. In the present report, we describe the case of a 63-year-old man with necrotic lipoma in the deep layer of the posterior thigh, which resembled a liposarcoma on imaging. To the best of our knowledge, only a few reports on necrotic lipoma on the extremities have been published. BACKGROUND

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Section: Discussioncontrasting

confidence: 53%

“…Fat necrosis is observed in rare conditions such as encapsulated fat necrosis,6 pancreatic fat necrosis7 and membranous fat necrosis 8. Encapsulated fat necrosis presents as a distinct subcutaneous lesion, and is characterised by nodular cystic fat necrosis encapsulated by fibrous tissue that is mobile in the subcutis.…”

Section: Discussionmentioning

confidence: 99%

Necrotic lipoma at the posterior thigh mimicking liposarcoma

et al. 2016

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“…Trauma is the major etiologic factor in fat necrosis. 25,26 One of the most valuable data in our study is the long-lasting bruising in our patients after severe trauma, and we assumed that this situation is related to localized fat necrosis. Although there are no data about the severity of blunt trauma to the soft tissue and the duration of the bruising formation in the literature, all of the cases who had fat necrosis after trauma had severe bruising.…”

Section: Discussionmentioning

confidence: 94%

Posttraumatic Lipoma: Analysis of 10 Cases and Explanation of Possible Mechanisms

Copçu

Sivrioğlu

2003

Dermatol Surg

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The effect of blunt trauma on fat tissue may be explained by different theories. We summarized possible mechanisms into two groups according to our observations and review of the literature: The first was related to mature adiposities and mainly a mechanical effect, and the second was differentiations of the preadipocytes to lipoma by the promoting factors. We speculate that only traumas that serve as a cause of fat necrosis may trigger the formation of the lipoma, and local inflammation secondary to fat necrosis may affect adipocytes and promote new formation of lipoma.

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“…8 There is a tendency for lesions to be multiple and most nodules tend to be mobile giving rise to the term 'thigh mouse'. 10 Most of these nodules are found in exposed areas of the body and, thus, the presumed aetiology of fat necrosis is frequent minor trauma giving rise to an interruption of blood supply. Even though the pathophysiological mechanism is unclear, the histopathological appearance is invariable.…”

Section: Fat Necrosismentioning

confidence: 99%

“…Calcification is thought to represent the end-stage of the lesion and in one series was present in 13 out of 49 cases. 8 The terms 'nodular-cystic fat necrosis', 7 'mobile encapsulated lipoma', 11 'thigh mouse', 10 and 'encapsulated fat necrosis ' 12 have all been used but the general consensus is that the latter term is the most representative.…”

Section: Fat Necrosismentioning

confidence: 99%

Subcutaneous thigh fat necrosis as a result of tourniquet control during total knee arthroplasty

Tamvakopoulos¹,

Toms²,

Glasgow³

2005

Ann R Coll Surg Engl

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A n 83-year-old female underwent a left total knee arthroplasty (replacement) as treatment for knee pain secondary to osteoarthrosis. The patient attended a routine pre-operative assessment a fortnight prior to an elective admission; she had no other past medical history and was found to be fit to proceed to surgery. She underwent an uncomplicated procedure under a combined spinal epidural anaesthetic implanting a Genesis II Total Knee Replacement prosthesis. A pneumatic tourniquet was used around the left thigh to achieve a bloodless field. A layer of cotton wool padding (velband) was applied over the left thigh and the tourniquet was applied over the padding. The limb was elevated and exsanguinated using a rubber limb exsanguinor and the tourniquet was then inflated to a pressure of 350 mmHg for a period of 90 min until the knee capsule and wound were ready to be closed in layers.Adequate haemostasis was achieved using diathermy and the knee capsule was closed over two drains. The subcutaneous tissue and skin were then closed, and the wound was dressed and padded with a compression dressing. Prior to leaving the operating theatre, the patient pressure points were checked as per routine protocol, and there was no evidence of an injury.The patient made an uncomplicated, early postoperative recovery and was discharged home 6 days later when she was able to mobilise safely with crutches. She was due to be followed up as an out-patient 6 weeks following her operation.She was reviewed a week later in clinic at her general practitioner's request because of the raised concern of a reported painful lump felt in her thigh suspected to be a superficial abscess. The clinical appearance was that of a soft, lobulated, mobile mass with a poorly defined edge covered by an area of indurated skin.Ultrasound examination was performed with a high resolution 7-12 MHz linear array probe (ATL HDI 5000, Philips Medical Systems, Andover, MA, USA). This demonstrated a relatively echogenic mass within the subcutaneous fat, with no discrete fluid collection and Subcutaneous thigh fat necrosis as a result of tourniquet control during total knee arthroplasty George S Tamvakopoulos 1 , Andoni P Toms 2 , Malcolm Glasgow

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Encapsulated fat necrosis: a case of ‘thigh mouse’

Cited by 14 publications

References 8 publications

Necrotic lipoma at the posterior thigh mimicking liposarcoma

Necrotic lipoma at the posterior thigh mimicking liposarcoma

Posttraumatic Lipoma: Analysis of 10 Cases and Explanation of Possible Mechanisms

Subcutaneous thigh fat necrosis as a result of tourniquet control during total knee arthroplasty

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