RT-PCR was successful in 92% of tested fibrolamellar carcinoma cases (24/26) and the DNAJB1-PRKACA fusion transcript was found in all fibrolamellar carcinomas but not in other tumor types.     ///    "In conclusion, detection of DNAJB1-PRKACA is a very sensitive and specific finding in support of the diagnosis of fibrolamellar carcinoma. "    ///    DNAJB1-PRKACA is specific for fibrolamellar carcinoma..     ///    "In addition, the stromal cells embedded in the characteristic intratumoral fibrosis of fibrolamellar carcinomas and the background liver tissues were negative for the DNAJB1-PRKACA fusion by all tested methods. "    ///    A recurrent DNAJB1-PRKACA fusion has recently been reported in fibrolamellar carcinomas. 