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Representative sections of a NSCLC tumour classified as strong A. and weak B. for CD70 expression based on dye intensity. A CD70 negative NSCLC sample is shown in C. Membranous D. and cytoplasmic E. accentuation of CD70 expression in NSCLC specimens. CD70 expression in a neuro-endocrine NSCLC primary biopsy (F). Magnitude is depicted in the lower right corner.
