In anatomy, a<unk> (plural<unk> a or<unk>  is any opening in the body. For example, a mouth, a nose, and an anus are natural<unk> a. Any hollow organ can be manipulated into an artificial<unk> as necessary. This includes the esophagus,<unk> h, duodenum, ileum, colon, pleural cavity, ureters, urinary bladder, and renal pelvis. Such a<unk> may be permanent or temporary. Surgical procedures that involve the creation of an artificial<unk> have names that typically end with the suffix "-ostomy", and the same names are also often used to refer to the<unk> thus created. For example, the word "colostomy" often refers either to an artificial anus or the procedure that creates one. Accordingly, it is not unusual for a<unk> to be called an ostomy (plural ostomies), as is the norm in wound, ostomy, and continence nursing.
Stoma 
Noma 
Seroma
Epulis
Mammoplasia
Polyp 
Mixed tumor
Adenoma