May Be Caused by

Arthritic subchondral cyst

Bone cyst

Bone infarct

Brucellosis

Chondroblastoma

Chondromyxoid fibroma

Clear cell chondrosarcoma

Cortical desmoid

Cystic osteomyelitis

Enchondroma

Fibrous cortical defect

Fibrous dysplasia

Fungal osteomyelitis

Hydatid disease

Intraosseous ganglion

Langerhans cell histiocytosis

Lipoma

Liposclerosing myxofibrous tumor

Mycetoma

Nonossifying fibroma

Osteoblastoma

Osteofibrous dysplasia

Osteoid osteoma

Periosteal desmoid

Syphilis

Traumatic subchondral cyst

Tuberculosis

Yaws