A woman in Australia had a 3-inch worm removed from her brain during a biopsy. The worm was identified as a previously unknown human parasite. The woman had been experiencing symptoms of forgetfulness and depression. The worm was likely contracted from consuming contaminated vegetation that contained the worm's eggs. The patient's symptoms improved after removing the worm, but some neuropsychiatric symptoms persisted. The woman is being treated with antiparasitic drugs and is being closely monitored.