Table 2. Tumors causing median nerve compression.
| Tumor | Frequency ( n ) | Percent of total (%) | Percent of category (%) | |
|---|---|---|---|---|
| Neural origin ( n = 35) |
Lipofibromatous hamartoma | 19 | 19 | 54 |
| Schwannoma | 8 | 8 | 23 | |
| Intraneural lipoma | 2 | 2 | 5.7 | |
| Intraneural perineurioma | 3 | 3 | 5.7 | |
| Neurothekeoma | 2 | 2 | 5.7 | |
| Plexiform neurofibroma | 1 | 1 | 2.9 | |
| Nonneural origin ( n = 63) |
Lipoma | 16 | 16 | 26 |
| Ganglion | 6 | 6 | 9.5 | |
| Fibroma | 6 | 6 | 9.5 | |
| Tenosynovial giant cell tumor | 5 | 5 | 3.2 | |
| Deep leiomyoma | 2 | 2 | 3.2 | |
| Heterotrophic ossification | 2 | 2 | 3.2 | |
| Myoepithelioma | 2 | 2 | 3.2 | |
| Myxofibrosarcoma a | 2 | 2 | 3.2 | |
| Osteochondroma | 2 | 2 | 3.2 | |
| Solitary calcified nodule | 2 | 2 | 3.2 | |
| Synovial sarcoma a | 2 | 2 | 3.2 | |
| Calcifying aponeurotic fibrolipoma | 1 | 1 | 1.6 | |
| Epithelioid sarcoma a | 1 | 1 | 1.6 | |
| Extraskeletal chondroma | 1 | 1 | 1.6 | |
| Glomus tumor | 1 | 1 | 1.6 | |
| Hamartoma | 1 | 1 | 1.6 | |
| Hibernoma | 1 | 1 | 1.6 | |
| Macrodystrophia lipomatosa | 1 | 1 | 1.6 | |
| Malignant tenosynovial giant cell tumor a | 1 | 1 | 3.2 | |
| Melorheostosis | 1 | 1 | 1.6 | |
| Metaplastic synovial cyst | 1 | 1 | 1.6 | |
| Metastasis of breast cancer a | 1 | 1 | 1.6 | |
| Neuroleukemiosis a | 1 | 1 | 1.6 | |
| Non-Hodgkin lymphoma a | 1 | 1 | 1.6 | |
| Osteophyte trapezium | 1 | 1 | 1.6 | |
| Synovial hemangioma | 1 | 1 | 1.6 | |
| Synovial osteochondromatosis | 1 | 1 | 1.6 | |
| Combined | Intraneural lipoma and AVM | 1 | 1 | 50 |
| Lipofibromatous hamartoma and osteochondroma | 1 | 1 | 50 |
Abbreviation: AVM, arteriovenous malformation.
a
Malignant tumors.