While multiple studies describe FABP1 expression frequencies that are in the range of our findings in hepatocellular carcinomas [31–33], colorectal adenocarcinomas [16, 34], pancreatic adenocarcinomas [19], and gastric adenocarcinoma [17], we were unable to detect any FABP1-positive cases among 169 adenocarcinomas of the lung, 12 small cell carcinomas of the lung, and 157 chromophobe carcinomas of the kidney. This evidence concerns the gene FABP1 and small cell lung carcinoma.