Table 2 Histological features of SPN in patients under 20 years of age (n = 29)
Histological features | Resection specimens (n = 20) | Incision biopsies (n = 9) | ||
|---|---|---|---|---|
Number of cases present | Percentage (%) | Number of cases present | Percentage (%) | |
Pseudopapillary architecture | 20 | 100% | 9 | 100% |
Solid areas | 20 | 100% | 9 | 100% |
Eosinophilic cytoplasm | 16 | 80% | 7 | 77.7% |
Myxoid stroma | 16 | 80% | 7 | 77.7% |
Hemorrhage | 15 | 75% | 7 | 77.7% |
Infarction | 14 | 70% | 6 | 66.7% |
Fibrosis | 14 | 70% | 6 | 66.7% |
Foamy/ hemosiderin laden macrophages | 12 | 60% | 5 | 55.5% |
Clear cells | 9 | 45% | 4 | 44.4% |
Hyaline globules | 6 | 30% | 3 | 33.3% |
Necrosis | 8 | 40% | 4 | 44.4% |
Cholesterol clefts | 7 | 35% | 3 | 33.3% |
Cystic degeneration | 2 | 10% | 1 | 11.1% |
Microcystic change | 5 | 25% | 2 | 22.2% |
Nuclear grooves | 5 | 25% | 2 | 22.2% |
Mitotic activity | 5 | 25% | 3 | 33.3% |
Atypical cells | 3 | 15% | 2 | 22.2% |
Giant cells | 4 | 20% | 2 | 22.2% |
Calcification | 3 | 15% | 1 | 11.1% |