What is a "keyhole" craniotomy?

What is a “keyhole” craniotomy?

Retro-sigmoid craniotomy (usually called “keyhole” craniotomy) is a minimally-invasive operational method done to remove brain tumors. This method allows for the removal of head base tumors through a small hole behind the ear, giving access to the cerebellum and brainstem. A neurosurgeon may use this method to reach specific tumors, such as meningiomas and acoustic neuromas (vestibular schwannomas).

Types of brain tumors treated with “keyhole” craniotomy:

The retro-sigmoid craniotomy is one of several treatment choices for brain tumors. It may be done for the following kinds of brain tumors:

  • Acoustic neuromas
  • Meningiomas
  • Metastatic brain or spine tumors
  • Skull base tumors

Benefits of “keyhole” craniotomy:

Retro-sigmoid craniotomy results in:

  • Shorter pain than an open craniotomy.
  • Faster healing than an open craniotomy.
  • Least scarring.
Keyhole Surgery