"The position is very good." Xu Zhiliang's voice is low, like he's talking to himself.
Yang Ping understood what he meant; the lesion's position was shallower than expected, only two millimeters away from the base wall of the fourth ventricle, nearly visible upon opening. This means no additional incision of brain tissue is necessary, minimizing damage to normal structures.
"Start cutting." Xu Zhiliang said.
A micro scissor extended into the surgical field, separating along the edge of the lesion bit by bit. The cavernous angioma doesn't have a true capsule, but its boundary is relatively clear, surrounded by a band of gliosis. Experienced doctors can peel the lesion completely along this gliosis band.
Xu Zhiliang's assistant carefully handled the small supplying arteries with bipolar electrocoagulation. Each blood vessel has to be clearly seen before coagulation; reckless burning may damage perforating blood vessels, causing ischemia in normal brain tissue.
