May Be Caused by

Amyloidosis

Aneurysmal bone cyst

Angiomatous lesion

Avascular necrosis

Avulsion fracture defect

Bone cyst

Bone sarcoma

Brodie abscess

Brown tumor of hyperparathyroidism

Chondroblastoma

Clear cell chondrosarcoma

Enchondroma

Giant cell tumor

Gout

Hemophilic pseudotumor

Hydatid cyst

Intraosseous ganglion

Langerhans cell histiocytosis

Lipoma

Metastasis

Osteoarthritis

Osteochondritis dissecans

Osteoid osteoma

Osteomyelitis

Pigmented villonodular synovitis

Plasmacytoma

Rheumatoid arthritis

Synovial herniation pit of femoral neck

Tuberculosis