POSTPARTUM PITUITARY APOPLEXY: A CASE REPORT Background: Postpartum pituitary apoplexy is an extremely rare neurological emergency. It may present with sudden onset of headache, vomiting, nausea and visual disturbances. This potentially life-threatening emergency requires a high index of suspicion from the attending clinician. Postpartum pituitary apoplexy was challenging to diagnose because of its symptoms that overlapped with multiple conditions. There are limited number of case reports on postpartum pituitary apoplexy. Case presentation: We present a case of a 30-year-old multipara with gestational diabetes mellitus presented with on and off headache since 37 weeks period of gestation. Her complaint was not investigated by medical personnel during her routine antenatal follow-up until she had a normal delivery. Subsequently, she developed diplopia, nauseated and vomiting episodes post-delivery but she only came to seek treatment in our emergency department on day 12 post-partum as symptoms are not resolving. Initial Contrast Enhanced Computed Tomography (CECT) of Brain revealed enhancing sellar lesion causing widening of pituitary fossa which then she was scheduled for Magnetic Resonance Imaging (MRI). MRI brain revealed lobulated sellar and suprasellar mass with mass effect to optic chiasm and she underwent endoscopic endonasal transsphenoidal excision of tumour. Post operatively, her vision improved and she was discharged subsequently with oral hormonal supplements. Conclusion: Diagnosis of pituitary apoplexy should be suspected whenever headache and neurological deficits are present although it is an extreme rare condition.