Fig. 5
From: Identification of diverse activating mutations of the RAS-MAPK pathway in histiocytic sarcoma
Frequent expression of PD-L1 in histiocytic sarcoma is not associated with gains of 9p24. a Pie chart and histogram showing frequency and extent (percentage of lesional cells positive) of PD-L1 protein expression, respectively, in 10 cases of histiocytic sarcoma. b Case of histiocytic sarcoma presenting as a parotid mass (left, H&E x400 magnification) showing diffuse and strong membranous reactivity for PD-L1 (right, x400 magnification) but c no evidence of copy-number changes at 9p24.1 (red dotted lines show area between 9p23 and 9p24.2)
