Lipomas are common benign mesenchymal tumors. They may develop in virtually all organs throughout the body. The anatomy depends on the tumor site. Subcutaneous lipomas are usually not fixed to the underlying fascia. The fibrous capsule must be removed to prevent recurrence.
In the GI tract, lipomas present as submucosal fatty tumors. The most common locations include the esophagus, stomach, and small intestine
Lipomas are the most common soft tissue tumor (benign or malignant).
One of several distinct benign lipomatous tumors. In its most conventional (simple) form, lipomas are composed of mature adipose tissue, typically enveloped by a well-defined thin fibrous capsule.
Not distinguishable histologically from normal adipose tissue
Found both superficially and deeply
Superficial lipomas are found above the waist involving the neck, shoulders, and trunk, followed by proximal limbs.
Deeper lipomas are uncommon and found subfascially in limbs, head and neck, trunk, abdomen, and mediastinum.
Several nonconventional forms of lipomas (less commonly encountered) have been described, which may present in multiple locations, contain varying amounts of both adipose and nonadipose tissue, and/or have more atypical cytologic features.
These nonconventional variants include chondroid lipoma, myolipoma, lipoblastoma, angiolipoma, spindle cell lipoma/pleomorphic lipoma, intramuscular/intermuscular lipoma, lipoma of tendon sheath and joint, lipoma arborescens, lipomatosis of nerve, diffuse