Table 3.

Correlation of FISH and immunohistochemistry results

ImmunohistochemistryFISH test result
ALK rearrangementALK germ-line
Without tyramide amplification
    Positive40
    Negative6233
With tyramide amplification
    Positive80
    Negative2233

NOTE: Ten of 20 cases with ALK rearrangement by FISH had available tissue for immunohistochemistry analysis.