omental cyst

Omental cysts are clinically rare. Small cysts generally cause no clinical symptoms, while large cysts often lead patients to seek medical attention due to a self-detected abdominal mass. Omental cysts are classified into true cysts and false cysts. True cysts are mainly retention cysts caused by lymphatic obstruction, with a few developing from congenital ectopic lymphatic vessels; another type of true cyst is the congenital dermoid cyst. False cysts form as a result of encapsulation following an inflammatory reaction.