I'll get straight to the point. This is my personal research about the alien itself. Your scientists are most likely aware of half the conclusions I managed to document so far, but this is better than nothing and it may give you a healthy headstart. I'm also expecting a feedback on the progress of the patient's treatment, a most -detailed- answer is preferable.
I am Dr. Bennet Marco and I take care of your brother. And I have to say he brought me a constantly ongoing headache. From what we know until now I don't see any way to extact the parasite without killing Mister Drum. Also there seems to be a malfunction in many of his organs. They work -but not how they should. We needed to increase his body temperature to do first tests, but luckily we did not dare to unfreeze him completely. He would not survive this for long. At the moment I am searching for a way to extract the main part of the parasite, but as the remaining parts would send masses of Cardamine into Mister Drums body he would die. First we have to find a way how to avoid this reaction. The option that we fully extract the nomad is not possible, because we are not able to extract every fine string the nomad created. Especially cutting the connection between the nomad and Mister Drums brain could cause heavy damage.
To ensure you that your brother is okay right now -as far as I can say that- I will send you access data to the camera placed in the lab and acess to the video logs. I hope we will find a way to terminate the parasite soon. I will contact you again when we have made further advances. But if you have any questions, Just ask.