Figure 5From: Quality assessment of DNA derived from up to 30 years old formalin fixed paraffin embedded (FFPE) tissue for PCR-based methylation analysis using SMART-MSP and MS-HRM CDKN2A ( p16 ) expression in NSCLC. A. A case in which immunohistochemical staining for p16 showed positive nuclear and cytoplasmic staining (×100). B. A case in which the invading tumor cells did not express p16 (×100).Back to article page