May Be Caused by

Amyloidosis

Aneurysmal bone cyst

Angioma

Bone cyst

Carcinoma of nail-bed

Chondroblastoma

Chondromyxoid fibroma

Chondrosarcoma

Enchondroma

Epidermoid inclusion cyst

Fibrous dysplasia

Ganglion

Giant cell tumor

Giant cell tumor of tendon sheath

Glomus tumor

Gout

Hemophilic pseudotumor

Keratoacanthoma

Leprosy

Leukemia

Lymphoma

Metastasis

Multiple myeloma

Osteoarthritis

Osteoblastoma

Osteoid osteoma

Osteomyelitis

Periosteal chondroma

Periosteal fibroma

Rheumatoid arthritis

Sarcoidosis

Skin cancer

Synovial lesion

Thorn granuloma

Tuberculosis

Tuberous sclerosis

Villonodular synovitis

Wilson disease

Xanthoma