"Once the Parasite's larvae hatch, the victim's brain becomes a maggoty cauliflower."

This translates roughly from the Spanish and Latin as coconut brain worm or bogeyman brain worm.  The clumsy nomenclature, the second definition of coco and the credible but made-up names of the medicines prescribed by Goose may have been among some of the suspicious details that lead Robert Frobisher (see next story) to surmise that the doctor is not all that he seems.