Table 2.
Comparative analysis of the histopathologic parameters in pleomorphic adenomas of the parotid gland and parapharyngeal space in our study (p values in bold: statistically significant).
| Histopathologic Features | Parotid Gland (%) | Parapharyngeal Space (%) | Total (%) | p | |
|---|---|---|---|---|---|
| Histologic subtype [2] | Hypercellular subtype (stroma content < 30%) | 189 (24) | 14 (24.1) | 203 | 0.972 |
| Mixed subtype (stroma content 30–50%) | 220 (28) | 17 (29.3) | 237 | ||
| Stroma-rich (myxoid) subtype (stroma content > 50%) | 377 (48) | 27 (46.6) | 404 | ||
| Total | 786 (100) | 58 (100) | |||
| Integrity of capsule | No capsule at all | 32 (4.1) | 4 (6.9) | 36 | 0.035 |
| Partial encapsulation | 105 (13.3) | 14 (24.1) | 119 | ||
| Intact capsule | 649 (8.3) | 40 (69) | 689 | ||
| Total | 786 (100) | 58 (100) | |||
| Pseudopodia | Presence of pseudopodia | 343 (43.6) | 22 (37.9) | 365 | 0.397 |
| No pseudopodia | 443 (56.4) | 36 (62.1) | 479 | ||
| Total | 786 (100) | 58 (100) | |||
| Satellite nodules | Presence of satellite nodules | 59 (8.1) | 12 (20.7) | 71 | <0.001 |
| Absence of satellite nodules | 727 (92.5) | 46 (79.3) | 773 | ||
| 786 (100) | 58 (100) | ||||
| Surgical invasion of the capsule | Surgical invasion of the capsule | 33 (4.2) | 5 (8.6) | 38 | 0.117 |
| No surgical invasion of capsule | 753 (95.8) | 53 (91.4) | 806 | ||
| Total | 786 (100) | 58 (100) | |||