this single-center retrospective study aims to investigate the clinical features of esophageal foreign bodies (EFBs) and determine the influence of EFB shapes on management and prognosis. A total of 427 patients aged 13 to 95 years with suspected EFB ingestion were enrolled between January 2013 and June 2018, 183 of whom were male. EFBs were divided into six shapes: pin (n = 161), sheet (n = 97), trident (n = 51), spindle (n = 66), irregular (n = 46), and sphere (n = 6). Spindle-shaped EFBs correlated with a significantly higher rate of perforation and severe complications (P < 0.001 and P = 0.021, respectively) than any other EFB shape, while sheet-shaped EFBs were linked to less severe complications (P = 0.006). The number of pressure points was provided to stratify the risk of poor prognosis for each shape. EFBs with only two pressure points (pin and spindle EFBs) required more advanced management strategies and were correlated with a higher number of patients suffering esophageal perforation (27.11%) and severe complications (12.44%) when compared with other shapes (χ 2 = 11.149 and P = 0.001; χ 2 = 5.901 and P = 0.015, respectively). Spindle shape was an independent risk factor for poor prognosis, and contributed a more clinical risk than the pin shape. In conclusion, clinical features, management, perforation rate, and severe complications differed based on EFB shape. The EFBs with two pressure points, especially the spindle-shaped EFBs, were more dangerous compared with those with more pressure points. An esophageal foreign body (EFB) is a relatively common complaint in the emergency room. Patients often complain about dysphagia, retrosternal pain, and occasionally abdominal pain prior to being diagnosed with an EFB. An EFB is often accompanied by serious medical conditions, such as cervical abscess, mediastinitis, aortoesophageal abscess, tracheoesophageal fistula, pneumonia, and pneumothorax, most of which are caused by esophageal perforation 1-6. Thus, an EFB can lead to death if the diagnosis is significantly delayed. However, some patients who have ingested foreign bodies do not immediately go to the hospital; instead, they attempt to dislodge EFBs, especially fish bones, by swallowing rice or vinegar 7. This prolongs the time between ingestion and effective treatment and leads the injury to become worse. Thus, it is important to appropriately evaluate the location, size, and shape of the foreign body and provide treatment in an emergency medical situation 8. Types of EFBs may differ among countries and regions according to eating habits, food culture, and sociocultural characteristics 9,10. In Asian countries, fish bones are the most frequent cause of EFBs; whereas, in Western countries, impacted meat is prevalent 11. In addition, many studies report interesting cases of patients ingesting unusual EFBs. For instance, Walton encountered a case that presented with torticollis after ingesting a button battery 12 , and Agrawal reported a case that ingested a metallic magnet with sharp metallic hooks on i...