Pilocytic astrocytomas of chiasma infiltrating the hypothalamus are relatively benign, but hardly surgically radically controlable. The prediction of their biologic evolution is difficult. In 1964 we operated an 8 years old girl with progressive decrease of vision. A surgical revision following pneumoencephalography revealed a chiasmal glioma and only biopsy could be perfomed. Subsequently radiotherapy was applied. After 14 years, because of severe general deterioration, angiography was performed. A suprasellar expansion and hydrocephalus was proved. Therefore a bilateral Torkildsen’s drainage was established. Half a year later following CT examination the tumor was partially removed, a cyst in the frontal lobe evacuated and anastomosed with the lateral ventricle. Now 39 years later the general state of the patient is good, although a significant expansion according to MRI is still present. In 1989 an 18 years aged woman was operated because of a glioma of the optic chiasma and hypothalamus. Only surgical revision and puncture could have been done. Later her vision partially improved. After several years she consulted us if she could have a child.We did not find any remark in the literature concerning an optic glioma associated with gravidity. In 1999 and 2001 she gave birth to healthy children. Her chiasmal tumor was not influenced either clinically or on MRI. An observation lasting for 39 and 13 years of patients with chiasmal gliomas and a case of gravidity in this disease can be undoubtly considered as unique.

        Key words: chiasmal astrocytoma, longterm observation, gravidity