ARAF and colorectal neoplasm: Key associations include the following: (i) anaerobic or gut-derived bacteremia with Bacteroides, Clostridium, Fusobacterium, or pks+ Escherichia coli before colorectal neoplasm; (ii) Streptococcus gallolyticus/bovis bacteremia and colorectal neoplasm; (iii) cryptogenic Klebsiella pneumoniae liver abscess and pancreaticobiliary or colorectal cancer; (iv) non-resolving pneumonia and segmental collapse before lung cancer.