I am a 19 year old boy with right temporal choroid plexus AVM in lateral ventricle (SM grade-2) diagnosed due to headache. Due to surgical complications, I underwent Gamma knife radiosurgery in 2017. There was a good process but suddenly there was a bleed last year, which resulted in mass effect and haemorrhage. The haematoma recovered without any surgery and there was no major defecit. Considering the risk of surgery, I was under waiting period. But now there was a porenchepaly at the site of haemorrhage. And cortical thinning was also observed in MRA. The AVM was still on the same size of 9mm *5mm as last year. Is there any complications associated with porenchepaly and cortical thinning? Is there any chance for porenchepaly to extend? There was behaviour change and depression like symptoms noted now. Waiting for your detailed answer on this regard, thanks in advance.