Clinicopathological Proficiency in the Diagnosis of Kaposi's Sarcoma

Table 5

Histological diagnostic discordance before immunohistochemistry.

Pathology	Overdiagnosis of KS 𝑛 (%)	Underdiagnosis of KS 𝑛 (%)	Total discordance rate 𝑛 (%)
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)