Erratum to: Acta Neurochir (2013) 155:1601–1609

DOI: 10.1007/s00701-013-1788-8

The original version of this article unfortunately contained mistakes. On page 1607 and 1608, the figure legends for Fig 5 and 6 should be interchanged. Figure 5 shows images obtained from a 64-year-old female with a nonfunctioning macroadenoma who underwent the two-nostril approach. Figure 6 comprises images obtained from a 51-year-old man with a GH-secreting macroadenoma who underwent the one-nostril approach.