[Serogroup C meningococcemia presenting as pericarditis in a 55-year-old woman without medical history]. / Péricardite purulente compliquant une méningococcémie du groupe C chez une femme de 55 ans sans antécédent notable.

In case of meningococcemia, isolated pericarditis is a rare event with a high mortality rate. We report the clinical and paraclinical signs that lead us to the diagnosis in a 55-year-old woman with favourable evolution. Previously described predisposing factors were no found.