What causes lipoma arborescens?
What causes lipoma arborescens?
The definite etiology of lipoma arborescens is unknown (1, 3), but the frequent occurrence of associated conditions (including local trauma, osteoarthritis, diabetes mellitus, and rheumatoid arthritis) suggests that this may be a reactive disease (1, 4, 5, 6, 13, 14).
What is synovial Lipomatosis?
Synovial lipomatosis is a rare disorder of the synovium, commonly affecting the knee joint, resulting in joint pain, swelling, and effusion. The etiology of this condition still remains unclear.
What is lipoma in the knee?
Lipoma arborescens (LA) is a rare, benign intra-articular lesion most commonly found in the knee, characterised by villous proliferation of the synovium. It generally presents as a longstanding, slowly progressive swelling of one or more joints associated which may or may not be associated with pain.
What causes synovial Osteochondromatosis?
The exact underlying cause of synovial chondromatosis is unknown. Some research suggests that trauma may play a role in its development because the condition primarily occurs in weight-bearing joints. Infection has also been considered as a contributing factor. The condition is not inherited .
When should you get a lipoma checked?
Call your provider if it’s growing rapidly (over weeks), feels hard or doesn’t move as easily when you touch it. Your provider will check the lipoma to see if it has blood vessels, which is a sign of a rare type of painful lipoma called an angiolipoma.
What is a lipoma arborescens?
Lipoma arborescens is a chronic, slow-growing, intra-articular lesion of benign nature, which is characterized by villous proliferation of the synovium, with replacement of the subsynovial connective tissue by mature fat cells. It usually involves the suprapatellar pouch of the knee joint.
What is chronic synovitis?
Synovitis (or synovial inflammation) is when the synovium of a joint becomes inflamed (swollen). The synovium, which is also sometimes called the stratum synoviale or synovial stratum, is connective tissue that lines the inside of the joint capsule.
What is Villonodular synovitis?
Diseases & Conditions Pigmented villonodular synovitis (PVNS) is a condition that causes the synovium—the thin layer of tissue that lines the joints and tendons—to thicken and overgrow. The mass or tumor that results from this overgrowth is not cancerous and does not spread (metastasize) to other areas of the body.
Where does lipoma arborescens of the knee occur?
Lipoma arborescens are rare lesions, typically located in the knee. They have a predilection for the suprapatellar pouch in the knee joint, but can also occur in any area of the knee joint.
What kind of disease does lipoma arborescens cause?
Lipoma arborescens. Lipoma arborescens is a rare condition affecting synovial linings of the joints and bursae, with ‘frond like’ depositions of fatty tissue.
What kind of MRI is used for lipoma arborescens?
MRI is the investigation modality of choice for lipoma arborescens; MRI can demonstrate high signal intensity of fat in lipoma arborescens on both, T-1 and T-2 weighted images.
What are the blue arrowheads on lipoma arborescens?
Severe chondral loss and associated subchondral degenerative changes (blue arrowheads) are evident at the patellofemoral joint. If signal is intermediate on T1-weighted images, the tissue may be hyaline cartilage, such as from synovial chondromatosis.