Abstract
OBJECTIVE To evaluate the contribution of referent pathologists (RPs) to the quality of diagnosis of trophoblastic diseases and to study the level of diagnostic agreement between the initial pathologists and the RPs.
METHODS This observational retrospective study was carried between 1st November 1999 and 11th January 2011 using the database of the French Trophoblastic Disease Reference Centre in Lyon. All files for hydatiform moles, trophoblastic tumours and non-molar pregnancies for which there was an initial suspicion of trophoblastic disease were included, whenever there was rereading of the slides by a RP. A total of 1851 hydatiform moles and 150 gestational trophoblastic tumours were analysed.
RESULTS When the initial pathologist diagnosed a complete mole, the RP confirmed the diagnosis in 96% of cases. When the initial pathologist diagnosed a partial mole, the RP confirmed the diagnosis in only 64% of cases. For trophoblastic tumours, when the initial pathologist diagnosed a choriocarcinoma, the RP confirmed the diagnosis in 86% of cases. When the initial anatomopathology suggested an invasive mole, the diagnosis was confirmed in 96% of cases. Finally, when the initial diagnosis was a placental site trophoblastic tumour or an epithelioid trophoblastic tumour, the RP confirmed the diagnosis in 60% and 100% of cases, respectively.
CONCLUSION A systematic policy of rereading of slides for all suspicious moles improves the quality of management of trophoblastic diseases at a national level.
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