Clinical Study
Clinicopathological Proficiency in the Diagnosis of Kaposi's Sarcoma
Table 5
Histological diagnostic discordance before immunohistochemistry.
| Pathology | Overdiagnosis of KS (%) | Underdiagnosis of KS (%) | Total discordance rate (%) |
| Seborrheic keratosis | 8 (29.6) | 7 (38.9) | 15 (33.3) | Fibrous histiocytoma | 9 (33.3) | 3 (16.7) | 12 (26.7) | Pyogenic granuloma | 5 (18.5) | 5 (27.8) | 10 (22.2) | Drug reaction vasculitis | 3 (11.1) | 3 (16.7) | 6 (13.3) | Haemangioma | 2 (7.4) | | 2 (4.4) |
| Total | 27 | 18 | 41/490 (9.2) |
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