Discussing CT features of esophageal hiatus hernia, to provide the basis for clinical diagnosis and treatment.

The CT imaging findings of 76 cases from radiology department in the Affiliated Hospital of Qingdao University(from january 2013 to jun 2017)with upper gastro-intestinal barium examination or gastroscopy proven esophageal hiatus hernia were retrospectively analyzed.

The main manifestations of CT were soft tissue masses located at the posterior-mediastinum, upper layer of esophageal hiatus, which communicated with gastric lumen under the diaphragm via esophageal hiatus, the distance between thecrura of diaphragm was widened in 61 cases(80.3%). According to anatomical features, there were sliding hiatal hernias of 58 cases, pure paraesophageal hernias of 4 cases, mixed hernias of 9 cases and type IV hernias of 5 cases with omental hernia.Of these, there were 30 cases(39.5%)pseudotumor type(diameter≥30 mm)and 46 cases(60.5%)of pseudonodular type(diameter<30 mm). "Gastric mucosa in chest" was 66 cases(86.8%), "Corset sign" was 49 cases(64.5%), "Fat surround sign" was 41 cases(53.9%), "Cable sign" was 16 cases(21.1%)and "Positive vascular sign" in type IV hernias was 5, they were clearly demonstrated on CT images, and the pseudotumor type sac showed the above specific signs, the probability was higher than the pseudonodular type sac.

CT can clearly display hernia sac and its multiple characteristic signs of EHH, it is very helpful in the diagnosis of EHH.