Abstract
Introduction: Uterine atony is the most common cause of primary post partum hemorrhage.
We report a case where this was complicated by two rare conditions, platelet storage pool disease
and placenta diffusa. Platelet storage pool disease is a platelet aggregation disorder associated with
mild to moderate bleeding diathesis. There are limited cases reported in pregnancy. Placenta diffusa
is a rare anomaly where all or part of the fetal membranes remain covered by chorionic villi, and
is associated with post partum hemorrhage.
Case presentation: A 37-year-old woman was referred to the obstetric haematology clinic for
prenatal counselling with a history of three severe post partum haemorrhages, two of which were
complicated by placental retention. Platelet aggregation studies confirmed a diagnosis of platelet
storage pool disease. She was counselled regarding her risk of a recurrent haemorrhage and a
planned delivery was discussed. She subsequently presented at 15 weeks' gestation. Following an
uneventful pregnancy, she was covered with prophylactic desmopressin and tranexamic acid before
a planned induction of labour. She had a normal delivery but placenta was retained. In theatre, an
uncomplicated manual removal was followed by massive haemorrhage secondary to uterine atony.
Aggressive medical management and B lynch sutures at laparotomy failed to contract the uterus.
Hysterectomy was therefore performed. Placental histology later showed evidence of partial
placenta diffusa.
Conclusion: Post partum hemorrhage continues to be a leading cause of maternal morbidity and
mortality. In this patient, despite identification and attempts at correction of an identified clotting
disorder, major obstetric hemorrhage was not avoided. An additional rare placental abnormality
was later found. This case highlights the need for medical staff to be aware and alert to unusual risk
factors. However, these factors may be unavoidable and early surgical intervention as per local
protocol is recommended to minimise maternal morbidity.