| Gorlin cyst | A mixed radiolucent-radiopaque lesion of the jaws with features of both a cyst and a solid neoplasm; characterised microscopically by an epithelial lining showing a palisaded layer of columnar basal cells, presence of ghost cell keratinization, dentinoid, and calcification. Synonym: calcifying and keratinizing odontogenic cyst, Gorlin cyst. (05 Mar 2000) |
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| periapical cyst | An inflammatory odontogenic cyst derived histogenetically from Malassez' epithelial rests surrounding the root apex of a nonvital tooth. Synonym: periapical cyst, radicular cyst, root end cyst. (05 Mar 2000) |
| pericardial cyst | <radiology> 90% on right, 25% symptomatic, Differential diagnosis: epicardial lymph node, fat (with or without steroids), Morgagni hernia (12 Dec 1998) |
| granddaughter cyst | A tertiary cyst sometimes developed within a daughter cyst, as in the hydatid cyst of Echinococcus. (05 Mar 2000) |
| mesenteric cyst | A congenital thin-walled cyst of the abdomen between the leaves of the mesentery, which may be of wolffian or lymphatic duct origin. As it enlarges it may cause colicky pain and intestinal obstruction. (dorlamd, 27th ed) (12 Dec 1998) |
| periodontal cyst | An epithelium-lined sac containing fluid; usually found at the apex of a pulp-involved tooth. The lateral type occurs less frequently along the side of the root. (12 Dec 1998) |
| grapeskin cyst | <radiology> Thin-walled pulmonary cavity, no fluid, most likely to be Coccidioides, ** cavitary lung disease (12 Dec 1998) |
| chocolate cyst | Cyst of the ovary with intracavitary haemorrhage and formation of a haematoma containing old brown blood; often seen with endometriosis of the ovary but occasionally with other types of cyst's. (05 Mar 2000) |
| choledochal cyst | <radiology> Segmental dilatation of common bile duct, F more than > M, 60% under 10 years of age, classic clinical triad in less than 40%, jaundice, RUQ mass, abdominal pain, choledochocele (type 3 cyst): bloops into duodenum, 8% associated with Caroli disease (12 Dec 1998) |
| phaeomycotic cyst | A subcutaneous cystic granuloma caused by pigmented fungi, usually solitary and located on the extremities. (05 Mar 2000) |
| root end cyst | An inflammatory odontogenic cyst derived histogenetically from Malassez' epithelial rests surrounding the root apex of a nonvital tooth. Synonym: periapical cyst, radicular cyst, root end cyst. (05 Mar 2000) |
| chyle cyst | A circumscribed dilation of a lymphatic channel of the mesentery, containing chyle. (05 Mar 2000) |
| milk cyst | A retention cyst in the mammary gland resulting from closure of a lactiferous duct. Synonym: milk cyst. (05 Mar 2000) |
| pilar cyst | A common cyst of the skin and subcutis which contains sebum and keratin, and is lined by pale-staining stratified epithelial cells derived from follicular trichilemma. Synonym: trichilemmal cyst. (05 Mar 2000) |
| piliferous cyst | A dermoid cyst containing hair. (05 Mar 2000) |