[Cystic lymphangioma: a practical problem of cervical oncology. Apropos of 4 cases].

Cystic hygroma is a benign dysembryoplasia of the lymphatic system of mainly cervical expression. Clinical findings of a stereotyped nature were found in 4 cases of this particular aspect of infantile surgical affections. On operation there was an obvious relation with the internal jugular vein, and an entire segment had to be removed in 2 cases. These data confirm conventional pathogenic theories.