Mycoplasma pneumoniae myocarditis is a rare condition, potentially very serious and seldom described in children. It is classically attributed to direct invasion or to an indirect immunological mechanism. The authors report the case of a 10 year old boy with myopericarditis, proved by authentic seroconversion, complicating congenital mitro-aortic valvular disease. In this case, the spectacular response to steroid therapy was in favour of an indirect immunological causal mechanism of the left ventricular dysfunction and pericardial involvement.
Child Glucocorticoids