Histologic classification of<unk>  or omental cysts: 
Lymphangioma: endothelial lining
Enteric duplication cyst: Enteric lining and double-muscle lining with neural elements;
Enteric cyst: Enteric lining (mucosa with no muscle layer
Mesothelial cyst: mesothelial lining
Nonpancreatic pseudocyst has no lining, with a fibrous wall.
The most common type of<unk>  or omental cyst is lymphangioma, followed by a nonpancreatic pseudocyst, a duplication cyst, a mesothelial cyst, and an enteric cyst.
Lymphangioma: endothelial lining
Enteric duplication cyst: Enteric lining and double-muscle lining with neural elements;
Enteric cyst: Enteric lining (mucosa with no muscle layer
Mesothelial cyst: mesothelial lining
Nonpancreatic pseudocyst has no lining, with a fibrous wall.
Mesenteric cyst
Splenic cyst
Appendiceal mucocele
Meckel's diverticulum
Enterocele
Intussusception
Duodenal diverticulum
Bile duct cyst