Central pontine and extra-pontine myelinolysis are a well known compli
cation of hyponatremia. Other causes may be present We report a case o
f head injury in a 13 year-old girl, who recovered well after surgery
for extra-dural hematoma, but presented endocrinological disorders wit
h hyperglycemia followed by a severe hyponatremia. Despite the correct
ion of these metabolic disorders, the patient became comatose, and MRI
, on T2 weighted image, showed hyperintense signals in the basal gangl
ia consistent with extra-pontine myelinolysis. The patient's state rem
ained unchanged for six weeks. Since S. Konno and H. Wakui published c
ases of myelinolysis who dramatically improved after TRH treatment, th
e patient was given 0.6 mg i.v daily of TRH for six weeks. Improvement
began within a few days, and continued until complete recovery.