COX2 expression is associated with proliferation and tumor extension in vestibular schwannoma but is not influenced by acetylsalicylic acid intake

Intensity distribution score of COX2 immunohistochemistry: 5–25% immunopositivity？=？1 (a); 25–50%？=？2 (b); 50–75%？=？3 (c); 75–100%？=？4 (d); healthy cerebrum (e), cerebellum (f) and colorectal carcinoma metastasis (g) served as controls and showed only single immunopositive cells. The distribution of the ID-score is presented as a bar graph (h