PMID- 26566410 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20151114 LR - 20200930 IS - 1918-3003 (Print) IS - 1918-3011 (Electronic) IS - 1918-3003 (Linking) VI - 7 IP - 12 DP - 2015 Dec TI - The Diagnosis of Choriocarcinoma in Molar Pregnancies: A Revised Approach in Clinical Testing. PG - 961-6 LID - 10.14740/jocmr2236w [doi] AB - BACKGROUND: Hydatidiform moles occur in approximately 1 in 1,500 pregnancies; however, early miscarriages or spontaneous abortions may not be correctly identified as molar pregnancies due to poor differentiation of chorionic villi. METHODS: The current clinical testing algorithm used for the detection of hydatidiform moles uses a combination of morphological analysis and p57 immunostaining followed by ploidy testing to establish a diagnosis of either a complete or partial molar pregnancy. We review here 198 referrals for fluorescence in situ hybridization (FISH) ploidy testing, where the initial diagnosis based on morphology is compared to the final diagnosis based on a combination of morphology, FISH and p57 immunohistochemical (IHC) staining. RESULTS: Approximately 40% of cases were determined to be genetically abnormal, but only 28.8% of cases were diagnosed as molar pregnancies. The underestimation of complete molar pregnancies and those with androgenetic inheritance was also found to be likely using conventional diagnostic methods, as atypical p57 staining was observed in approximately 10% of cases. CONCLUSIONS: Our findings suggest that a revised approach to testing products of conception is necessary, with cases screened according to their clinical history in order to distinguish molar pregnancy referrals from hydropic pregnancies. FAU - Duffy, Lisa AU - Duffy L AD - Diagnostic Genetics, LabPLUS, Auckland City Hospital, Auckland, New Zealand. FAU - Zhang, Liangtao AU - Zhang L AD - Diagnostic Genetics, LabPLUS, Auckland City Hospital, Auckland, New Zealand. FAU - Sheath, Karen AU - Sheath K AD - Diagnostic Genetics, LabPLUS, Auckland City Hospital, Auckland, New Zealand. FAU - Love, Donald R AU - Love DR AD - Diagnostic Genetics, LabPLUS, Auckland City Hospital, Auckland, New Zealand. FAU - George, Alice M AU - George AM AD - Diagnostic Genetics, LabPLUS, Auckland City Hospital, Auckland, New Zealand. LA - eng PT - Journal Article DEP - 20151023 PL - Canada TA - J Clin Med Res JT - Journal of clinical medicine research JID - 101538301 PMC - PMC4625817 OTO - NOTNLM OT - Fluorescence in situ hybridization OT - Hydatidiform moles OT - Molar pregnancies OT - Ploidy EDAT- 2015/11/14 06:00 MHDA- 2015/11/14 06:01 PMCR- 2015/10/23 CRDT- 2015/11/14 06:00 PHST- 2015/07/06 00:00 [accepted] PHST- 2015/11/14 06:00 [entrez] PHST- 2015/11/14 06:00 [pubmed] PHST- 2015/11/14 06:01 [medline] PHST- 2015/10/23 00:00 [pmc-release] AID - 10.14740/jocmr2236w [doi] PST - ppublish SO - J Clin Med Res. 2015 Dec;7(12):961-6. doi: 10.14740/jocmr2236w. Epub 2015 Oct 23.