Overall, RKIP immunoreactivity appeared to be predominantly cytoplasmic and homogeneous throughout the tumor, with protein expression levels determined to be negative in 36.8% (25/68; Fig. 1A), weak in 30.8% (21/68) and positive in 32.4% (22/68; Fig. 1B) of samples. This evidence concerns the gene PEBP1 and neoplasm.