| 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) |
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| piliferous cyst | A dermoid cyst containing hair. (05 Mar 2000) |
| pilonidal cyst | A special kind of abscess that occurs in the cleft between the buttocks. Forms frequently in adolescence after long trips that involve sitting. (12 Dec 1998) |
| pineal cyst | A cyst of the pineal gland; rarely of clinical importance. (05 Mar 2000) |
| colloid cyst | A cyst with gelatinous contents. (05 Mar 2000) |
| morgagnian cyst | A small fluid-filled cyst attached by a slender stalk to the fimbriated end of the uterine tube; a vestigial remnant of the embryonic mesonephric duct. Synonym: appendix vesiculosa, Morgagni's hydatid, morgagnian cyst, stalked hydatid, vesicular appendage. (05 Mar 2000) |
| mother 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) |
| compound cyst | A cyst containing several compartments formed by membranous septa. Synonym: compound cyst. (05 Mar 2000) |
| mucous cyst | A retention cyst resulting from obstruction in the duct of a mucous gland. Synonym: mucocele. (05 Mar 2000) |
| wolffian cyst | A cyst lying in the broad ligaments of the uterus and arising from any mesonephric structures. (05 Mar 2000) |
| multilocular cyst | A cyst containing several compartments formed by membranous septa. Synonym: compound cyst. (05 Mar 2000) |
| multilocular hydatid cyst | A hydatid cyst of a multiloculate type, usually in the liver, caused by Echinococcus multilocularis, adults of which are in foxes; larvae (alveolar hydatid) are found chiefly in microtine rodents, but also among humans such as trappers and others handling pelts of infected foxes and other carnivores; growth is by exogenous budding and is not limited by an outer laminated membrane as in the hydatid cyst from E. Granulosus; necrosis, cavitation, contiguous spread, and death usually ensue. Synonym: multilocular hydatid cyst, multiloculate hydatid cyst. (05 Mar 2000) |
| Cowper's cyst | A retention cyst of a bulbourethral gland. (05 Mar 2000) |
| popliteal cyst | A synovial cyst in the popliteal space arising from the semimembranous bursa or the knee joint. (12 Dec 1998) |
| myxoid cyst | 1. A knot or knotlike mass. 2. <anatomy> A general term for a group of nerve cell bodies located outside the central nervous system, occasionally applied to certain nuclear groups within the brain or spinal cord, for example basal ganglia. 3. <oncology, tumour> A benign cystic tumour occurring on a aponeurosis or tendon, as in the wrist or dorsum of the foot, it consists of a thin fibrous capsule enclosing a clear mucinous fluid. (18 Nov 1997) |