Management of primary or recurring grossly cystic craniopharyngiomas by means of draining systems. Topic review and 6 case reports.

In primary or relapsing grossly cystic craniopharyngiomas most of the problems related to the neoplastic mass may be, even if temporarily, improved by reducing volume of the cyst. A major surgical approach is unjustified when the aim is only to empty the cyst contents. Drainage of the cyst cavity by means of derivative techniques may be as effective and less invasive; in combined management plans that such tumours often require, they are, therefore, useful complementary procedures that can achieve long-lasting relief of symptoms, provided that the cyst is unilocular. Technical features and indications for such methods, with special regard to the techniques of sump drainage and of tube ventriculocystostomy, are discussed on the basis of the few reported series and of 6 personal cases. Usually only palliative aims are achieved, waiting for more definitive treatment; in a few selected cases, however, they may be quite effective.