Grey Matter (2017) is a Documentary film that follows we follow neurosurgeons Clemens Dirven and Arnoud Vincent of the Erasmus MC in Rotterdam in this documentary during the treatment of three patients with a brain tumor. Currently, you can watch Grey Matter on Amazon Video. Streaming availability may vary by country and platform over time. It has a user rating of 5.0 out of 10 from 2 votes. Fans of documentary movies may also want to explore similar titles below.