Table 2.
Histopathological diagnosis of 669 patients with sacral benign tumors and tumor-like lesions
| Primary benign tumor | No.(percentage) in BT/TLL | No.(percentage) in all patients |
|---|---|---|
| Giant cell tumor | 205 (30.6%) | 205 (14.8%) |
| Neurofibroma | 155 (23.2%) | 155 (11.2%) |
| Schwannoma | 119 (17.8%) | 119 (8.6%) |
| Tuberculosis | 24 (3.6%) | 24 (1.7%) |
| Teratoma | 23 (3.4%) | 23 (1.7%) |
| Sacral canal cysts | 22 (3.3%) | 22 (1.6%) |
| Epidermoid cyst | 21 (3.1%) | 21 (1.5%) |
| Hemangioma | 14 (2.1%) | 14 (1.0%) |
| Meningeal cysts | 13 (1.9%) | 13 (0.9%) |
| Primary aneurysmal bone cyst | 12 (1.8%) | 12 (0.9%) |
| Fibrous dysplasia | 9 (1.3%) | 9 (0.6%) |
| Osteoblastoma | 9 (1.3%) | 9 (0.6%) |
| Eosinophilic granuloma | 7 (1.0%) | 7 (0.5%) |
| Simple bone cyst | 5 (0.7%) | 5 (0.4%) |
| Spinal meningioma | 5 (0.7%) | 5 (0.4%) |
| Gut-tail cyst | 4 (0.6%) | 4 (0.3%) |
| Benign fibrous histiocytoma | 4 (0.6%) | 4 (0.3%) |
| Fibromatosis | 3 (0.4%) | 3 (0.2%) |
| Diffuse giant cell tumor of tendon sheath | 3 (0.4%) | 3 (0.2%) |
| Chondroblastoma | 3 (0.4%) | 3 (0.2%) |
| Lipoma | 2 (0.3%) | 2 (0.1%) |
| Phosphouria stromal tumor | 2 (0.3%) | 2 (0.1%) |
| Osteoidosteoma | 2 (0.3%) | 2 (0.1%) |
| Leiomyoma | 1 (0.1%) | 1 (0.07%) |
| Paget disease | 1 (0.1%) | 1 (0.07%) |
| Osteochondroma | 1 (0.1%) | 1 (0.07%) |
BT/TLL benign tumor and tumor-like lesions