Invisible Voices Make Accurate Diagnosis

In the winter of 1984, a woman in her mid-40s was quietly reading at home in London when a voice appeared in her head. "Please don't be afraid," it said. The voice was measured, almost apologetic. It knew she'd be frightened. It identified itself as two former staff from Great Ormond Street Children's Hospital and said they had come to help.

Understandably frightened, she assumed she was having a mental health crisis. Her general practitioner gave her an urgent referral to a psychiatric clinic, where she was diagnosed with "functional hallucinatory psychosis," the clinical term for a break with reality that has no identifiable structural cause. She received counseling and an antipsychotic called thioridazine. After two weeks, the voices disappeared and she went on vacation. Then, still on medication, they came back. This time, they told her to return home immediately for medical treatment.

The voices gave her a specific address. Reluctantly, her husband drove her there. It was the CT department of a large London hospital. As she arrived, the voices told her to go in and ask for a brain scan: she had a tumor, and her brain stem was inflamed.

The hospital refused — no clinical basis for it, they said. His colleagues made clear, afterward, that they thought he'd taken a hallucinatory patient far too literally. He ordered it anyway. The scan revealed a tumor in the tissues covering the woman's brain. It was surgically removed. When she woke from surgery, she heard the voice one final time: "We are pleased to have helped you. Goodbye." The voices never returned. A 12-year follow-up confirmed it.

At a conference, other medical professionals suggested that because the tumor was so large, the patient may have subconsciously detected something was wrong or perhaps her anxiety had manifested as voices drawing her attention to information she didn't realize she already had. The brain contains no pain-sensing nerves, so what exactly she perceived remains unresolved.

The most rigorous explanation available is also the most unsatisfying one: the tumor probably caused the hallucinations, and the hallucinations happened to be accurate. Happened to name the condition. Happened to provide an address. Happened to say goodbye after surgery and never come back.

Medicine has a word for cases like this. The word is "unexplained."

Read the full story at Live Science, April 15, 2025