Are findings in the distal colorectum associated with proximal advanced serrated lesions?
The findings at flexible sigmoidoscopy that traditionally serve as indications for colonoscopy (conventional adenomas) are likely to be ineffective for detection of proximal ASL. This finding, plus the observation that most patients with proximal ASL have no distal polyps, favors screening colonoscopy over sigmoidoscopy, especially in the elderly. The observation that non-advanced distal SSA/Ps are associated with any proximal SSA/P warrants further study.
Thinning of the GCIPL is first detectable at 1 month after NAION and persists for 3 months. GCIPL thinning occurs before RFNL thinning in NAION.