| hydatidiform mole, invasive | A tumour or tumour-like process invading the myometrium, and characterised by trophoblastic hyperplasia and persistence of placental villous structures. It commonly results from complete hydatidiform mole but may do so from partial hydatidiform mole. Invasive mole may metastasize but it does not exhibit the progression of a true cancer, and it may regress spontaneously. (holland et al., cancer medicine, 3d ed, p1691) (12 Dec 1998) |
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| surgical procedures, minimally invasive | Procedures that avoid use of open invasive surgery in favour of closed or local surgery. These generally involve use of laparoscopic devices and remote-control manipulation of instruments with indirect observation of the surgical field through an endoscope or similar device. With the reduced trauma associated with minimally invasive surgery, long hospital stays may be reduced with increased rates of short stay or day surgery. (12 Dec 1998) |
| invasive | 1. Having the quality of invasiveness. 2. Involving puncture or incision of the skin or insertion of an instrument or foreign material into the body, said of diagnostic techniques. (18 Nov 1997) |
| invasive cancer | Cancer that has spread to surrounding tissue. (16 Dec 1997) |
| invasive carcinoma | <tumour> A neoplasm in which collections of epithelial cells infiltrate or destroy the surrounding tissue. (05 Mar 2000) |
| invasive cervical cancer | Cancer that has spread from the surface of the cervix to tissue deeper in the cervix or to other parts of the body. (12 Dec 1998) |
| invasive mole | chorioadenoma destruens |
| invasive species | Non-native species disrupting and replacing native species. (09 Oct 1997) |
| autoimmune thyroiditis | <endocrinology> Inflammation of the thyroid gland without the formation of pus. Noninfectious nonbacterial thyroid inflammation. (27 Sep 1997) |
| parasitic thyroiditis | Chronic South American trypanosomiasis with involvement of the thyroid gland, causing myxoedema. (05 Mar 2000) |
| giant cell thyroiditis | Thyroiditis with round cell (usually lymphocytes) infiltration, destruction of thyroid cells, epithelial giant cell proliferation, and evidence of regeneration; thought by some to be a reflection of a systemic infection and not an example of true chronic thyroiditis. Synonym: de Quervain's thyroiditis, giant cell thyroiditis. (05 Mar 2000) |
| giant follicular thyroiditis | A variant of Hashimoto's thyroiditis in which lymphocytic infiltrate in thyroid has formed into giant follicles. (05 Mar 2000) |
| Riedel's thyroiditis | A rare fibrous induration of the thyroid gland, with adhesion to adjacent structures, which may cause tracheal compression. Synonym: chronic fibrous thyroiditis, ligneous struma, ligneous thyroiditis, Riedel's disease, Riedel's struma. (05 Mar 2000) |
| chronic atrophic thyroiditis | Replacement of the thyroid gland by fibrous tissue, the commonest cause of myxoedema in older persons. (05 Mar 2000) |
| chronic fibrous thyroiditis | A rare fibrous induration of the thyroid gland, with adhesion to adjacent structures, which may cause tracheal compression. Synonym: chronic fibrous thyroiditis, ligneous struma, ligneous thyroiditis, Riedel's disease, Riedel's struma. (05 Mar 2000) |