Lipoma arborescens
Lipoma arborescens is a rare, benign joint disorder characterized by a subsynovial, villous proliferation of adipose tissue. It has a characteristic tree-like (arborescent) morphology and is most commonly found in the knee joint.
Causes and Symptoms
The exact cause of lipoma arborescens is not fully understood. However, it is believed to be a reactive change in adipose tissue, possibly in response to chronic inflammation or injury within the joint. The main symptoms are pain and joint effusion.
Diagnosis
This was also the case with our 49-year-old patient, who presented with swelling above the origin of the right vastus lateralis that developed after strength training. The clinical examination raised suspicion of an insertion lesion of the vastus lateralis. Magnetic resonance imaging (MRI) confirmed the diagnosis of a lipoma arborescens.
Treatment
Treatment for lipoma arborescens may vary depending on the severity of symptoms and the degree of joint dysfunction. Options include:
– Conservative measures such as physical therapy and pain management
– Corticosteroid injections to reduce inflammation and pain
– Arthroscopic synovectomy
