Cavum vergae and psychiatric illness: substantive or serendipity?

Description

A 38-year-old woman presented with 1-month history of restlessness, decreased sleep, religious song auditory hallucination and delusion of persecution and reference. She had no insight into her illness. She was not on any long-term medications. There was no history of head trauma or exposure to toxins. She suffered from postpartum psychosis during both her pregnancies (8 and 11 years ago) which warranted inpatient treatment with antipsychotics and mood stabilisers. She defaulted treatment both times once she got better and did not experience any recurrence of symptoms until current episode. She had no other comorbidities or significant family history. Her general medical and neurological examination findings were within normal limits. Routine laboratory tests did not reveal any abnormality. A brain MRI diffusion weighted imaging sequence demonstrated cavum vergae (CV, figure 1A) and MRI brain apparent diffusion coefficient sequence showing CV and thinned out cavum septum pellucidum (CSP, figure 1B). She was initially...

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