Definition: Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.
Input: Abstract: We report a rare case of supra- and infratentorial arteriovenous malformations (AVMs), which were separate and consisted of aneurysmal dilations with two or three afferent arteries and efferent veins. Surgical resections were performed without the occurrence of additional neurological deficits. We discuss the treatment of multiple AVMs and stress that size and the structures involved are more important factors in the prognosis than the multiplicity of the lesions.

Supra- and infratentorial arteriovenous malformations with an aneurysmal dilatation: a case report.