There are no codes in the vulvar excision section for a cyst removal (other than Bartholin's) and this cyst was of the labia so that rules out the vaginal cyst excision code of 57135. The code I have settled on is 11423: Excision, benign lesion including margins...genitalia; excised diameter 2.1 to 3.0cm.
A ll modern mollusks have the same fundamental body plan. There are three distinct body zones: a head-foot, a visceral mass and a mantle. Some common features are 1  : Unsegmented soft body with bilateral symmetry.
The phylum as a whole has adult bilateral symmetry and cephalization (the development of a head with sensory organs, in most members). Flatworms have three tissue layers: ectoderm, mesoderm and endoderm and a body plan that is acoelomate and sac-like with a single opening.seudocoelomate animals (such as roundworms) have a body cavity but it does not develop from splitting of the mesoderm embryonic tissue layer.Coelomate animals (humans, fish, shrimp, such as shown in Figure 4) have a body cavity lined with mesoderm cells. Figure 4.