Abstract:Objective To investigate the clinical features of painless intussusception in order to identify it early and avoid delay in diagnosis and treatment. Methods A retrospective analysis was performed on the clinical data of 5 patients with painless intussusception treated from June 2013 to December 2019,including clinical symptoms,signs,abdominal color Doppler ultrasound and abdominal CT findings,intraoperative confirmation and pathological examination. Results There were 3 males and 2 females,aged from 4 months to 4 years and 1 month old.The diagnosis could not be confirmed at the initial stage becaused of atypical clinical manifestations.The specific clinical manifestations were no-crying in 5 cases,mental fatigue,pale complexion and bloody stool in 5 cases,vomiting and fever in 4 cases,dehydration,abdominal mass and rectal mass revealed by digital rectal examination in 3 cases and abdominal distension in 2 cases.Exploratory laparotomies were respectively performed on 1 patient on the 2nd day of disease,3 patients on the 3rd day of disease and 1 patient on the 4th day of disease,and the intussusception with intestinal necrosis was confirmed by pathology.After operation,all patients were treated with symptomatic and supportive treatment such as fasting,anti-infection,intravenous nutrition.All patients were discharged from hospital with good prognosis. Conclusions The clinical manifestation of infant painless intussusception is atypical and easy to be complicated with intestinal necrosis.When the patient presented with hematochezia,vomiting and mental fatigue,the more attention should be paied in abdominal mass,which can be revealed by digital rectal examination and repeatedly abdominal color Doppler ultrasound.Exploratory laparotomy is performed if necessary in order to avoid leading to intestinal necrosis,intestinal perforation,shock and other serious complications.