[Brain stem encephalitis due to Mycoplasma genitalium].

A 5 years old girl is described with infection due to Mycoplasma genitalium causing brain stem encephalitis. The diagnosis was established by polymerase chain reaction assay of the cerebrospinal fluid which demonstrated DNA of Mycoplasma genitalium. She was somnolent, had left abducens nerve palsy, and aphasis. The T2 weighted scan showed high signal intensity of pontine in magnetic resonance imaging (MRI) of the central nervous system. She recovered and was discharged without any sequelae.