Source:http://linkedlifedata.com/resource/umls/id/C1268222
FMA: Anatomical surface, which is the external surface of a body part or a body part subdivision. Examples: surface of head, surface of front of neck, epigastric region, sacral region, surface of dorsum of right foot.,UWDA: Anatomical surface, which is the external surface of a body part or a body part subdivision. Examples: surface of head, surface of front of neck, epigastric region, sacral region, surface of dorsum of right foot.