In contrast, in thyroid carcinomas with single component histology, RET/PTC1 was detected in 11% of PCs and in none of the UCs, and RET/PTC3 was not found in any of the tumours studied.     ///    "RET/PTC1 was undetectable in both components from all seven composite UCs, and RET/PTC3 was identified in both components of one composite UC. "