Hydatidiform mole as seen in a university teaching hospital: a 10-year review

Hydatidiform mole (HM), is a known cause of early pregnancy wastage and has the risk of malignant potential. This is a retrospective study of 71 patients who were managed for hydatidiform mole at the University of Maiduguri Teaching Hospital, (UMTH) Maiduguri over a 10-year period, from January 1996 to December 2005, inclusive. The objective of the study was to determine the incidence, risk factors, clinical presentations and histological types of HM. Case records of 71 histologically confirmed HM were studied. Their sociodemographic characteristics, clinical presentations and histology reports were obtained and analysed. The institutional incidence of molar pregnancy was 3.8/1,000 deliveries. Histological findings showed partial mole in 51 (71.8%) cases and complete mole in 20 (28.2%) cases. The peak age-specific incidence rate was 17.5 years. The leading presenting clinical feature was abnormal vaginal bleeding seen in 100%. No case of invasive mole was found. Maternal complications included severe haemorrhage requiring blood transfusion (30.0%) and infections (15.5%). There was no maternal death. In conclusion, the incidence of partial hydatidiform mole was found to be higher than that of complete variety in our environment and the identified risk factors were young age, low parity and previous history of HM.