Syringobulbia is not contagious. It is a rare neurological condition characterized by the presence of a fluid-filled cavity (syrinx) in the brainstem. Syringobulbia is typically caused by a congenital abnormality or acquired conditions such as trauma or tumors. It is not caused by any infectious agent and cannot be transmitted from person to person. Syringobulbia is a non-communicable condition that requires medical evaluation and treatment.