Fig. 5From: Sarcomatoid mesothelioma diagnosed in a patient with mesothelioma in situ: a case report on morphologic differences after 9-month interval with details analysis of cytology in early-stage mesotheliomaHistological findings from the second sample (computed tomography-guided biopsy for a solid nodule in right pleura) (a–f). a, b Spindle-shaped tumor cells with strong nuclear atypia and nuclear disparities in size show diffused growth with loose connectivity. c WT1 was focal positive. d BAP1 was retained. e MTAP was absent in almost all tumor cells. f Homozygous deletion of CDKN2A (31.0%) was confirmed in tumor areasBack to article page