The reversal sign.

We report a 36-year-old woman with a bacterial meningitis. CT after resuscitation showed a striking "reversal sign." Opinions on the pathogenesis of this sign are discussed; it indicates serious brain damage and carries a poor prognosis.

[Multiple tumors in the midline of the brain with endocrine dysfunction].

A patient is reported with hypothalamic-pituitary dysfunction due to multiple cerebral midline tumours of germinoma type. The symptomatology and differential diagnosis are reviewed. The necessity of stereotactic biopsy is discussed.