<a href="/hospitals/blk-max-super-speciality-hospital-delhi">BLK Max Super Speciality Hospital Delhi</a> - 16,974 reviews, <a href="/hospitals/memorial-bahcelievler-hospital-istanbul">Memorial Bahcelievler Hospital Istanbul</a> - 8,503 reviews, <a href="/hospitals/memorial-sisli-hospital-istanbul">Memorial Sisli Hospital Istanbul</a> - 7,421 reviews, <a href="/hospitals/sikarin-hospital-bangkok">Sikarin Hospital Bangkok</a> - 4,436 reviews, and <a href="/hospitals/teknon-medical-centre-barcelona">Teknon Medical Centre Barcelona</a> - 2,469 reviews are brain tumour centers with a significant number of patient feedbacks.