Cronkhite-Canada syndrome (CCS) is currently considered to be a non-genetic disorder and a relatively rare clinical condition that is characterized endoscopically by multiple polyps in the gastrointestinal tract and clinically manifested by gastrointestinal symptoms, skin pigmentation, hair loss, and nail loss. In this paper, we analyzed the clinical characteristics and treatment procedures of three patients diagnosed with CCS at Qilu Hospital of Shandong University from August 2012 to September 2021 and reviewed the relevant literature. The diagnosis of CCS is based on medical history, physical examination, endoscopic findings of gastrointestinal polyps, and histopathology, with gastrointestinal endoscopy being the most direct means of examination. All three patients presented endoscopically with diffuse multiple polyps in the gastrointestinal tract, had hair and nail loss and were free of HP infection. Moreover, case 1 and case 3 both had reduced serum albumin levels; case 2 and case 3 were negative for ant