Posttraumatic Lipoma Research Articles

A Novel Case of Cervical Lipoma Arising From Surgical Incision.

Lipoma is a benign mesenchymal tumor primarily found in subcutaneous fat. Post-traumatic lipoma (PTL) sporadically associates with blunt of penetrating trauma, but the exact mechanism remains not fully understood. This article unveils a rare case of a 32-year-old male presenting with a cervical lipoma at a previous surgical incision, an unprecedented occurrence. The patient incidentally detected the mass and underwent complete excision, with pathology confirming the diagnosis. The etiology of PTL remains speculative, with proposed mechanisms postulating inflammatory chemokines inducing preadipocyte differentiation and acute trauma causing septal rupture, allowing lipoma formation. Notably, the prior use of blade in our patient's surgical procedure aligns with this hypothesis. The varied nature of trauma encompasses acute, blunt, and penetrating injuries. This case represents the second instance attributed to penetrating trauma and the first occurrence at a surgical incision site.

POST TRAUMATIC INTRAORAL LIPOMA OF BUCCAL MUCOSA: A CASE REPORT

Introduction: Lipoma is a benign mesenchymal tumor of fatty tissue with uncertain pathogenesis but post-traumatic is believed to be one of the contributing factors. Lipomas are rarely seen in the oral cavity and most commonly in the proximal area of the extremities. Most of the oral lipomas are less than 3 cm in size and show no symptoms. The buccal mucosa is the most common predilection area in the oral cavity. The purpose of this case report is to describe the characteristics and treatment of post-traumatic lipomas in the oral cavity. Case report: A 12-year-old boy patient presented with a complaint on the right cheek. Three years earlier, the patient had a history of trauma to his right cheek but there was not any sign. The patient complained that the lump was getting bigger in the last 2 years with a size of 4x3x2 cm3 and was not accompanied by pain, then the patient was treated with a biopsy excision and the results of Anatomical Pathology (AP) showed the patient has a lipoma. Post evaluation after 12 months showed no surgical complications and recurrence. Conclusion: Post-traumatic lipoma is a rare disorder in the oral cavity. Clinical, radiological examination, AP examination, and adequate surgical therapy showed a postoperative good result. It is expected that this case report can be used as an additional reference in the case of oral lipoma.

A Giant Oral Lipoma with Possible Post-Traumatic Origin: A Rare Entity at the University Teaching Hospital Center of Yaounde

Lipomas are benign tumors of adipose tissue with pathogenesis and a controversial etiology. An explicit link between soft tissue trauma and the occurrence of lipomas is difficult to establish. However, some cases have been described. These soft tissue tumors have been called post-traumatic lipomas. Clinically oral lipomas appear as yellowish nodular masses less than 3 cm in diameter. Yet the oral lipoma can increase in size from 5 to 11 cm over several years. The reported case is the first referred in our service. It was a mass located on the inside of the left cheek painless, nodular, yellowish about 8 cm in diameter, secondary to trauma. The treatment was surgical under local anesthesia. In the presence of mature fat cells very similar in appearance to the surrounding normal fat associated with a detachment of the superficial layers of the oral epithelium, the suggested diagnosis was a posttraumatic intraoral lipoma.

Sports-related Lipoma: A Case Report

Indroduction: Lipomas are relatively common and are the most prevalent benign soft-tissue neoplasm. The transformation of lipomas into malignant liposarcomas is relatively rare, and the precise etiology and pathogenesis of lipomas are not well understood. Few published studies or case reports of post-traumatic lipomas have been described in the medical literature, and the pathological link between blunt trauma and formation of lipomas remains controversial. Case presentation: 46 year-old male presented to the clinic complaining of right knee swelling and the presence of a leg mass. The patient reported that he previously sustained blunt leg trauma during a basketball game at the site of his leg mass. After increased growth of his leg mass on imaging, he sought medical and surgical evaluation. The patient decided to pursue surgical resection with pathologic specimen review. The patient underwent surgical resection of the right thigh mass and the final pathologic diagnosis was a lipoma. Conclusion: When evaluating a patient with a lipoma, physicians should ascertain whether or not the patient has sustained previous trauma at the site of the mass lesion. It appears from this case report that blunt trauma during sports may be a risk factor for the future development of soft tissue lipomas. Further epidemiologic research is necessary to clearly ascertain this pathologic link.

A giant subpectoral lipoma.

A giant subpectoral lipoma.

Unilateral Gynecomastia in a Tennis Player

Unilateral Gynecomastia in a Tennis Player

Posttraumatic myxoid lipoma of the lower lip mimicking a mucocele

Lipoma is a common tumour that may be confounded with other soft tissue lesions. We report a case of posttraumatic myxoid lipoma of the lip which was first diagnosed as a mucocele.Clinical distinction between a lipoma and a mucocele may be troublesome especially in the lip. The physiopathology of the posttraumatic lipoma is discussed. Myxoid lipoma is very rare in the oral cavity.

Post-traumatic lipoma in chronic irritated device pocket

Introduction: ICD-implantation is well-established therapy for ventricular arrhythmias with low complication rate. Besides technical failure forcing lead/device replacement, swelling of device pocket represents the most common reason for surgical re-intervention. The local pocket embossment could originate from bleeding, acute or chronic pocket infection, mechanical irritation and may finally lead to device or lead perforation or may cause recidivating fistula or seroma. Affected patients often suffer from painful motoric constraints and are consequently scheduled for pocket revisions.

Giant inframuscular lipoma disclosed 14 years after a blunt trauma: A case report

IntroductionLipoma is the most frequent benign tumor of the soft tissue. This lesion is often asymptomatic except in cases of enormous masses compressing nervous-vascular structures. Although the diagnosis is mostly clinical, imaging tools are useful to confirm the adipose nature of the lesion and to define its anatomic border. Sometimes, lipomas may be the result of a previous trauma, such as in this patient.Case presentationA 45-year-old man presented at our institution with a giant hard firm mass in the upper external quadrant of the right buttock disclosed after a weight loss diet. Subsequent magnetic resonance imaging showed a giant adipose mass developed beneath the large gluteal muscle and among the fibers of the medium and small gluteal muscles. When questioned on his medical history, the patient reported a blunt trauma of the lower back 14 years earlier. He underwent surgery and histological examination confirmed a giant lipoma.ConclusionLipomas might result from a previous trauma. It is hypothesized that the trigger mechanism is activated by cytokine and growth factors released after the trauma. We herein present an exceptional case of a giant post-traumatic lipoma which caused a painful compression on the right sciatic nerve.

Posttraumatic Lipoma: Fact or Fiction?

Both trauma and lipomas are a common occurrence in surgical practice. Lipomas are usually benign adipose tumors with as-yet unexplained pathogenesis and etiology. A link between soft tissue trauma and the formation of lipomas has been described, with the latter being named posttraumatic lipomas. Twenty-three cases of posttraumatic lipomas in 19 patients treated at our institution between August 2001 and January 2005 were reviewed with regard to medical history, magnetic resonance imaging findings, intraoperative findings, clinical chemistry, and histology. The mean age of the patients was 50.0 years (+/-15.5). The average time between soft tissue trauma and lipoma formation was 2.6 years (range, 0.5-6.0 years). Sixteen of the 19 patients reported extensive and slowly resolving hematoma formation after the traumatic event. Nine of 23 lipomas were found on the upper extremities, 3 on the lower extremities, 9 on the trunk, and 2 on the face. All tumors were located epifascially. Twenty-two lipomas were removed by simple excision and, in one case, aspiration lipectomy was performed. Pathology demonstrated capsulated and noncapsulated benign adipose tumors in 23 cases. The average body mass index, amounted to 30 kg/m(2) (+/-7.6 kg/m(2)). Seven patients without known bleeding disorders presented with an elevated partial thromboplastin time. The pathogenetic link between soft tissue trauma and the formation of posttraumatic lipomas is still controversially discussed. There are 2 potential explanations to correlate soft tissue trauma and adipose tissue tumor growth. The first is the formation of so-called posttraumatic pseudolipomas by prolapsing adipose tissue through fascia resulting from direct impact. A second possibility points toward lipoma formation as a result of preadipocyte differentiation and proliferation mediated by cytokine release following soft tissue trauma and hematoma formation.

Lipomas after blunt soft tissue trauma: are they real? Analysis of 31 cases

Soft tissue trauma and lipomas are common occurrences in surgical practice. Lipomas are defined as benign tumours of adipose tissue with so far unexplained pathogenesis and aetiology. A link between preceding blunt soft tissue trauma at the site of the tumour and the formation of lipomas has been described earlier. These soft tissue tumours have been named 'post-traumatic lipomas'. In a retrospective review, to analyse all patients with benign adipose tissue tumours treated at our institution between August 2001 and January 2007. All cases were reviewed regarding medical history, magnetic resonance imaging findings, intraoperative findings, clinical chemistry and histology. In 170 patients presenting with lipomas, 34 lipomas in 31 patients were identified as post-traumatic. The mean +/- SD age of the patients with post-traumatic lipomas was 52 +/- 14.5 years. The mean time elapsed between soft tissue trauma and lipoma formation was 2.0 years (range 0.5-5). Twenty-five of the 31 patients reported an extensive and slowly resolving haematoma after blunt tissue trauma at the site of lipoma formation. The mean +/- SD body mass index was 29.0 +/- 7.6 kg m(-2). Fourteen of 31 patients presented with an elevated partial thromboplastin time. Eleven of 34 lipomas were found on the upper extremities, five on the lower extremities, 13 on the trunk, and two on the face. All tumours were located subcutaneously, superficial to the musculofascial system. Thirty-three lipomas were removed by surgical excision and one by liposuction following an incisional biopsy. Histological examination revealed capsulated and noncapsulated benign adipose tissue in all 34 tumours. The existence of a pathogenic link between blunt soft tissue trauma and the formation of post-traumatic lipomas is still controversial. Two potential mechanisms are discussed. Firstly, the formation of so-called post-traumatic 'pseudolipomas' may result from a prolapse of adipose tissue through fascia induced by direct impact. Alternatively, lipoma formation may be explained as a result of preadipocyte differentiation and proliferation mediated by cytokine release following soft tissue damage after blunt trauma and haematoma formation.

Posttraumatic lipoma: analysis of 10 cases and explanation of possible mechanisms.

Trauma and lipoma are the most frequently met occurrences in clinical routine. Although lipomas are well-known fatty tumors both clinically and pathologically, the precise etiology is still unknown. Generally, posttraumatic lipomas are known as "pseudolipoma," which describes herniation of deeper fat through Scarpa's layer secondary to trauma. Here we present 10 patients with lipoma secondary to blunt trauma in different anatomical sites. To correlate trauma and lipoma relationships and to discuss the possible pathogenetic mechanism by reviewing literature. Ten patients (12 lipomas) after blunt trauma were presented, and data of patients were reviewed. Ultrasonography and/or nuclear magnetic resonance were employed for diagnosis in addition to physical examination. All tumors were verified by histopathologic examinations. Patients were followed for a minimum of 6 months. The average age was 34. Four of the lesions (12 altogether) were located on an upper extremity, 5 on a lower extremity, 2 on the trunk, and 1 on the neck. Excision of tumors and primary closure were performed in 92% of the lesions, and only one liposuction was performed. Aesthetic results were achieved in all patients. There were no complications and recurrences. 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.

Subpectoral post-traumatic lipoma

Although post-traumatic lipomas have been reported in various sites, a subpectoral location has, to the best of our knowledge, not previously been described. We report on the clinicopathological, radiological, intraoperative and postoperative details of a post-traumatic subpectoral lipoma in a 35-year-old black African female.

Post-traumatic lipomas of the abdominal wall

Amongst pathologists there is difficulty in defining precisely the term “lipoma” (Willis, 1967). A localised mass of fat in some patients undoubtedly represents a true neoplasm, whereas in others it may be simply a prolapse of normal fat through a deficiency in the enveloping fascia (Brooke and MacGregor, 1969). The following case illustrates how prolonged pressure or sudden trauma may be responsible for the formation of some apparent lipomas.