A girl who does not grow and has strange blue spots on her tongue

Key words: Blue tongue, Recurrent candidiasis, Delayed growth

The case of a girl with a strange blue colour on her tongue (and not only) is the opportunity to present, in a tale-like style (narrative medicine), the way that enables to make a diagnosis of a rare disease. In this case the diagnostic reasoning has its two typical features: non-analytic (intuitive, unconscious) reasoning and analytic (hypothetical-deductive, rational) reasoning that require study and bibliographic research techniques.