Lipoma Arborescens: A Rare Cause of Synovial Mass of the Knee at Pediatric Age with 10 Year Follow-up

Abstract

Lipoma arborescens (LA) is a benign lesion that occurs in the synovial joints and consists of villous lipomatous proliferation of mature fat cells in the subsynovial tissue, often involving the knee joint. In addition to the knee joint, shoulder, elbow, and hip joint involvements have also been reported in the literature. The most common site of involvement in the knee joint is the suprapatellar pouch. Patients usually present with painless joint range of motion and swelling. Laboratory parameters are within normal limits. LA can be divided into two subtypes as primary and secondary according to the age of the patient or the underlying rheumatological diseases. The primary type is mostly seen in pediatric patients and there is no underlying chronic inflammation. In the secondary type, there is underlying chronic inflammation or trauma. In this case study, we described the operation process and 10-year follow-up of an 8-year-old pediatric patient who applied to our clinic with knee swelling.

Keywords

• Lipoma Arborescens
• Pediatric Patient
• Follow-Up

10 Yıllık Takip ile Pediatrik Yaşta Dizde Sinovyal Kitlenin Nadir Bir Nedeni Lipoma Arborescens

Abstract

Lipoma arboresans (LA), sinovyal eklemlerde görülen ve sıklıkla diz ekleminin tutan olgun yağ hücrelerinin subsinovyal dokuda villöz lipomatöz proliferasyonundan oluşan iyi huylu bir lezyondur. Diz eklemi dışında omuz, dirsek kalça eklem tutulumları da literatürde bildirilmiştir. Diz ekleminde en sık tutulan yer subrapatellar bursadır. Hastalar genellikle ağrısız eklem hareket kısıtlılığı ve şişlik ile başvurular. Laboratuvar parametreleri sıklıkla normaldir. LA hastanın yaşına ya da alta yatan romatolojik hastalıklara primer ve sekonder olarak 2 tipe ayrılabilir. Primer tip daha çok genç hastalarda görülür ve alta yatan kronik bir enflamasyon yoktur. Sekonder tipte ise alta yatan kronik enflamasyon veya travma vardır. Biz bu olgu çalışmamızda, kliniğimize dizde şişlik nedeniyle başvuran 8 yaşındaki pediatrik hastanın operasyon sürecini ve 10 yıllık takibini anlattık.

Keywords

• Lipoma Arboresans
• Pediatrik Hasta
• Takip

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