[Multiple complications of a mycoplasma pneumoniae infection].

We report the case of a patient who was admitted to hospital for a pneumonia in association with a Stevens-Johnson syndrome. The association of these conditions suggested a Mycoplasma pneumoniae infection, which was confirmed on serology. There were three other extra-respiratory complications discovered: cold agglutinins, a disturbance of liver function tests, and circulating anticoagulant; both the two latter and the Stevens-Johnson syndrome are rare complications.