Colloid cyst of third ventricle presenting as pseudoeclampsia.

A 32 years old omani woman G6P4A1 at 39 weeks of pregnancy presented with complaints of headache and picture of eclampsia. Emergency caesarean section was done for maternal and foetal distress. Post caesarean section patient could not be extubated from general anaesthesia. Emergency computed tomography scan of the brain was done which revealed colloid cyst of the third ventricle with severe acute obstructive hydrocephalus leading to irreversible brain damage and death. Colloid cyst of the third ventricle is a rare benign intracranial tumour, and pregnancy often masks the symptoms. High index of suspicion and early detection of tumour may be life saving.