Lesion

Number

Benign lesion

211

Lipoma

68

Hemangioma

31

Pigmented Villo-Nodular Synovitis

20

Fibromatosis

18

Schwannoma

14

Cyst

11

Synovial Chondromatosis

7

Elastofibroma

5

Others (e.g. Fibromyxoma, Neurofibroma, Fibrolipoma)

37

Malignant lesion

50

Undifferentiated Pleomorphic Sarcoma

8

Extraskeletal Chondrosarcoma

6

Liposarcoma

6

Metastatic tumor

6

Lymphoma

5

Myxofibrosarcoma

4

Atypical Lipomatous Tumor

2

Rhabdomyosarcoma

2

Myxoid liposarcoma

2

Synovial Sarcoma

2

Others (e.g. Melanoma, Extraskeletal Osteosarcoma, Extraskeletal Ewing’s Sarcoma)

7

Non-tumor

(e.g. Infection, Granuloma, Pseudotumor)

43

Undiagnostic

18

PCB repeated in 14 cases

Benign lesion

6

Hemangioma 

3

Lipoma

1

Pigmented Villo-Nodular Synovitis

1

Fibromatosis

1

Malignant lesion

2

Undifferentiated pleomorphic sarcoma

1

Lymphoma

1

Non-tumor (e.g. Granuloma)

3

Undiagnostic

3