| hydatiform mole | <radiology> Trophoblastic proliferation with avascularity of chorionic villi, marked oedema and enlargement of chorionic villi, severe eclampsia prior to 24 weeks, 1st trimester bleeding, abnormal elevation of beta-hCG, passing grapelike vesicles per vagina, uterus large for dates (50%), hyperechoic intrauterine tissue interspersed with numerous punctate hypoechoic areas (hydropic villi), in 25% atypical appearance: large hyperechoic areas (blood clots) and areas of cystic degeneration; resembles incomplete abortion, thick hyperechoic rim around central anechoic zone, bilateral theca lutein cysts (18-37%) see also: gestational trophoblastic disease, hydatiform mole: types (12 Dec 1998) |
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| hydatiform mole: types | <radiology> Complete/classical mole, fertilization of an empty egg; diploid karyotype (paternal XX), no foetal parts; no chorionic membrane, 20% malignant complete mole with coexistent foetus (2%), molar degeneration of an identical twin partial mole, areas of molar change alternating with normal chorionic villi, triploid karyotype (66% XXY; 33% XXX), early onset of preeclampsia, foetal structures present (e.g., placenta), no malignant potential see: hydatiform mole (12 Dec 1998) |
| spider mole | spider angioma |
| stalked hydatid | 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) |
| nonpedunculated hydatid | A vesicular nonpedunculated structure attached to the cephalic pole of the testis; a vestige of the cephalic end of the paramesonephric (mullerian) duct. Synonym: appendix testis, appendix of the testis, nonpedunculated hydatid, ovarium masculinum, sessile hydatid. (05 Mar 2000) |
| invasive mole | chorioadenoma destruens |
| osseous hydatid cyst | A morphological form of hydatid cyst caused by Echinococcus granulosus, and found in the long bones or the pelvic arch of humans if the embryo is filtered out in bony tissue; in this site no limiting membrane forms and the cyst grows in an uncontrolled fashion, producing cancellous structures and inducing fracture, followed by spread to new sites. (05 Mar 2000) |
| false mole | <gynaecology> An intrauterine polyp. (05 Mar 2000) |
| unilocular hydatid cyst | The commonest form of hydatid cyst in man, caused by Echinococcus granulosus and found in the liver, lungs, or any other site where the hexacanth embryo may settle if it passes the hepatic or pulmonary capillary filters; characterised by large balloon-like forms lined internally with a germinative membrane, enclosed externally in a laminated membrane within a host-parasite capsule, and filled with fluid (hydatid fluid) and infectious scoleces of the young tapeworms (hydatid sand). (05 Mar 2000) |
| fleshy mole | A uterine mass occurring after foetal death and consisting of blood clots, foetal membranes, and placenta. Synonym: blood mole, carneous mole. (05 Mar 2000) |