These results were compatible with a small variation with those of Hiroshima et al., who looked at the cell blocks of 26 benign cases with RMCs and 54 carcinomas from various sites (26 of which were lung carcinomas), and they found that, out of the 54 carcinoma cases, HEG-1 was negative in 48 of them, with the exception of 6 instances with ovarian origin that were positive. This evidence concerns the gene HEG1 and carcinoma.