| POS | periosteal osteosarcoma; physician order set; point of service; polycystic ovary syndrome; psychoorg... |
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| POU | placenta, ovary, and uterus |
| RAHO | rabbit antibody to human ovary |
| RAPO | rabbit antibody to pig ovary |
| SCO | sclerocystic ovary; somatic crossing-over; subcommissural organ |
| radicular cyst | Slow-growing fluid-filled epithelial sac at the apex of a tooth with a nonvital pulp or defective root canal filling. (12 Dec 1998) |
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| ganglion cyst | <dermatology, tumour> A small cystic tumour, composed of ganglion cells, containing viscous fluid and connected either with a joint membrane or a tendon sheath. Commonly found on the back of the wrist, hands or feet. (27 Sep 1997) |
| gartner duct cyst | <radiology> Cyst in lateral wall of vagina, remnant of wolffian duct (12 Dec 1998) |
| Gartner's cyst | A cyst of the principal duct in the vestigial structures of the paroophoron in the cervix or anterolateral vaginal wall, corresponding to the sexual portion of mesonephros in the male. (05 Mar 2000) |
| Gartner's duct cyst | <gynaecology> A closed sac on or under the vaginal mucosa that contains fluid or semi-solid material. These may occur secondary to trauma. Treatment may include surgical excision. (27 Sep 1997) |
| gas cyst | A cyst with gaseous instead of the ordinary liquid or pultaceous contents. (05 Mar 2000) |
| pancreatic cyst | A true cyst of the pancreas to be distinguished from the much more common pancreatic pseudocyst by possessing a mucous epithelial lining. Pancreatic cysts are categorised as congenital, retention, neoplastic, parasitic, enterogenous, or dermoid. Congenital cysts occur more frequently as solitary cysts but may be multiple. Retention cysts are gross enlargements of pancreatic ducts secondary to ductal obstruction. (12 Dec 1998) |
| Rathke's cleft cyst | An intrasellar or suprasellar cyst lined by cuboidal epithelium derived from remnants of Rathke's pouch. (05 Mar 2000) |
| parasitic cyst | A cyst formed by the larva of a metazoan parasite, such as a hydatid or trichinal cyst. (05 Mar 2000) |
| parent cyst | A hydatid cyst from the inner, or germinal, layer, from which secondary cyst's containing scoleces (daughter cyst's) are developed; sometimes tertiary cyst's (granddaughter cyst's) are developed within the daughter cyst's; occurs most frequently in the liver, but may be found in other organs and tissues; symptoms are those of a tumour of the part affected. Synonym: parent cyst. (05 Mar 2000) |
| paroophoritic cyst | A cyst arising from the paroopheron. (05 Mar 2000) |
| parovarian cyst | A cyst of the epoophoron or parovarium, a vestigial structure associated with the ovary, consisting of a more cranial group of mesonephric tubules and a corresponding portion of the mesonephric duct. (12 Dec 1998) |
| gingival cyst | A cyst derived from remnants of the dental lamina situated in the attached gingiva, occasionally producing superficial erosion of the cortical plate of bone; most are located in the cuspid-premolar region. (05 Mar 2000) |
| parvilocular cyst | A tumour composed of multiple small cyst's. (05 Mar 2000) |
| globulomaxillary cyst | A cyst of odontogenic origin found between the roots of the maxillary lateral incisor and canine teeth. (05 Mar 2000) |